KR20240031925A - Flow plate for electrolysis cell and electrolysis cell comprising same - Google Patents

Abstract

The present invention relates to a flow path plate for an electrolysis cell and an electrolysis cell including the same. The flow path plate for an electrolysis cell according to the present invention is a flow path plate for an electrolysis cell that faces an electrode that causes an electrochemical reaction, and supplies raw material fluid. a supply-side flow path portion formed with a plurality of branched branch flow paths, and a channel portion connected to one side of the supply-side flow path part and forming a plurality of channels through which the supplied raw material fluid moves, wherein the supply-side flow path portion includes a plurality of channels. A flow path block is provided, the branch flow path is branched into a plurality of channels through the plurality of flow blocks, and each width of the branch flow path branched into a plurality of branches is uniform.

Description

Flow plate for electrolysis cell and electrolysis cell comprising same}

The present invention relates to a flow path plate for an electrolysis cell and an electrolysis cell including the same.

In cells that electrolyze carbon dioxide (CO2) and convert it into useful resources such as CO or ethylene, in order to scale up, it is necessary to secure a certain level of active area through enlarging the area in addition to stacking.

When designing a large-area cell, it is important to design a flow path structure that can uniformly supply CO2 gas and electrolyte to the entire active area.

Most of the research on conventional CO2 electrochemical conversion technology has focused on securing performance in small cells, and when the active area of the cell is increased by applying the same method of small cells, the efficiency of large-area cells increases in small cells. It may be lower compared to the cell.

One aspect of the present invention is to provide a flow path plate for an electrolysis cell that can improve mass transfer characteristics and cell performance efficiency and an electrolysis cell including the same.

The flow path plate for an electrolysis cell according to an embodiment of the present invention is a flow path plate for an electrolysis cell that faces an electrode that causes an electrochemical reaction, and includes a supply side flow path portion formed with a plurality of branched flow paths for supplying raw material fluid, and the supply side flow path. It includes a channel part where the part and one side are connected to form a plurality of channels through which the supplied raw material fluid moves, wherein the supply side flow path part is provided with a plurality of flow path blocks, and the branch flow path flows through the plurality of flow blocks. is branched into a plurality of branches, and each width of the branch passages branched into a plurality of branches may be uniform.

Additionally, the electrolysis cell according to the embodiment of the present invention may include a flow path plate for an electrolysis cell according to the embodiment of the present invention and the electrode facing the flow path plate.

According to the present invention, in the flow path plate for an electrolysis cell facing the electrode, the flow path is branched to have a uniform branch flow path width through a plurality of flow path blocks in the supply side flow path portion where a plurality of branched flow paths for supplying the raw material fluid are formed. Accordingly, the raw material fluid can be supplied to flow uniformly through a plurality of channels of the channel portion through which the raw material fluid moves.

Accordingly, the flow of the reactant fluid is improved, improving the mass transfer characteristics required for the electrochemical reaction, optimizing performance efficiency, and improving durability by preventing local deterioration.

1 is a side view exemplarily showing an electrolysis cell according to an embodiment of the present invention.
Figure 2 is a plan view illustrating a flow path plate for an electrolysis cell according to a first embodiment of the present invention.
Figure 3 is an enlarged plan view showing a portion of the supply side flow path portion in the flow path plate for an electrolysis cell according to the first embodiment of the present invention.
Figure 4 is a plan view illustrating a flow path plate for an electrolysis cell according to a second embodiment of the present invention.
Figure 5 is an enlarged plan view showing a portion of the supply side flow path portion in the flow path plate for an electrolysis cell according to the second embodiment of the present invention.
Figure 6 is a plan view illustrating a flow path plate for an electrolysis cell according to a third embodiment of the present invention.
Figure 7 is an enlarged plan view showing a portion of the supply side flow path portion in the flow path plate for an electrolysis cell according to the third embodiment of the present invention.
Figure 8 is an image showing the flow velocity distribution in the flow path plate for an electrolysis cell according to Comparative Example 1.
Figure 9 is an image showing the flow velocity distribution in the flow path plate for an electrolysis cell according to Preparation Example 1.
Figure 10 is an image showing the flow rate distribution in the flow path plate for electrolysis cell according to Preparation Example 2.
Figure 11 is an image showing the flow rate distribution in the flow path plate for an electrolysis cell according to Preparation Example 3.

The objectives, specific advantages and novel features of the present invention will become more apparent from the following detailed description and preferred embodiments taken in conjunction with the accompanying drawings. In this specification, when adding reference numbers to components in each drawing, it should be noted that identical components are given the same number as much as possible even if they are shown in different drawings. Additionally, the present invention may be implemented in many different forms and is not limited to the embodiments described herein. Also, in describing the present invention, detailed descriptions of related known technologies that may unnecessarily obscure the gist of the present invention will be omitted.

Euro plate for electrolysis cell according to the first embodiment

Figure 1 is a side view exemplarily showing an electrolysis cell according to an embodiment of the present invention, Figure 2 is a plan view exemplarily showing a flow path plate for an electrolysis cell according to a first embodiment of the present invention, and Figure 3 is a view showing the present invention. This is an enlarged plan view showing a portion of the supply side flow path portion of the flow path plate for an electrolysis cell according to the first embodiment of the invention.

Referring to FIGS. 1 to 3, the flow path plate 100 for an electrolysis cell according to the first embodiment of the present invention is a flow path plate 100 for an electrolysis cell facing an electrode E that causes an electrochemical reduction reaction. ), and includes a supply side flow path portion 120 for supplying the raw material fluid, and a channel portion 130 in which a plurality of channels 131 (Channel) through which the supplied raw material fluid moves are formed. Additionally, the flow path plate 100 for an electrolysis cell according to the first embodiment of the present invention may include a manifold inlet 110, a discharge side flow path 140, and a manifold outlet 150.

More specifically, in the flow path plate 100 for an electrolysis cell according to the first embodiment of the present invention, the supply side flow path portion 120 may be formed with a plurality of branched flow paths 123 that supply raw material fluid. Here, the raw material fluid may include carbon dioxide (CO2) and an electrolyte solution. At this time, the electrolyte solution may include water (H2O).

The supply-side passage portion 120 is provided with a plurality of passage blocks 121, and the branch passage 123 may be branched into a plurality of passages through the plurality of passage blocks 121. In other words, the flow path that supplies the raw material fluid through the plurality of flow path blocks 121 may form a branch flow path 123 branched into a plurality of branches.

In addition, the widths (W1, W2) of the plurality of branch passages 123 may be uniform. Here, “uniform” means that the difference between the widths W1 and W2 of the plurality of branched passageways 123 is constant. That is, the widths (W1, W2) of the plurality of branch passages 123 of the supply-side passage portion 120 may be the same. In particular, the width (W1) of the branch passages 123 located on both sides of the supply-side passage portion 120 can be formed to be the same as the width (W2) of the remaining branch passages 123 of the supply-side passage portion 120. . Here, indented grooves 120a are formed on both sides of the supply-side flow path 120, and the width W1 of the branch flow path 123 located on both sides of the supply-side flow path 320 is the supply side flow path. It can be formed to be the same as the width W12 of the remaining branch passage 123 of the portion 120.

At this time, the plurality of branch flow paths 123 may be part of the flow path facing the channel portion 130.

Meanwhile, the widths (W1, W2) of the plurality of branch passages 123 branched from the supply-side passage portion 120 through the plurality of passage blocks 121 may be, for example, 0.25 to 1 mm.

The number of branch passages 123 of the supply-side passage portion 120 may correspond to the number of channels 131.

The positions of the plurality of branch flow paths 123 of the supply-side flow path portion 120 and the positions of the plurality of channels 131 of the channel portion 130 may be provided to correspond to each other. That is, for example, referring to FIG. 2, the plurality of branch passages 123 and the plurality of channels 131 may be located on the same line in the vertical direction.

For example, the plurality of flow blocks 121 may have a circular or non-circular cross section. At this time, the plurality of flow blocks 121 may be specifically formed to have a circular cross-section, for example.

One side of the channel portion 130 may be connected to the supply side flow path portion 120 to form a plurality of channels 131 through which the supplied raw material fluid, carbon dioxide, and electrolyte solution move.

The channel portion 130 faces the electrode E, and a plurality of channels 131 are formed on the surface of the channel portion 130 facing the electrode E, so that the raw material flows through the plurality of channels 131. The fluid comes into contact with the electrode (E) and an electrochemical reaction occurs at the electrode (E).

The channel unit 130 may have a plurality of channels 131 formed in a straight line so that the raw material fluid moves in a straight direction from one side where the supply-side flow path unit 120 is located to the other side.

At this time, a plurality of channel protrusions 131a may be formed in a straight line to form a straight channel 131. That is, the channel protrusion 131a protrudes in the direction of the electrode E, but, referring to FIG. 2, may extend in the vertical direction to form a channel 131, which is a passage through which fluid moves in the vertical direction.

Also, for example, the width WC1 of the channel 131 may be larger than the widths W1 and W2 of the plurality of branch passages 123 of the supply side passage portion 120.

In addition, the width WC1 of the channel 131 may be, for example, 0.5 to 2 mm.

Meanwhile, the area of the channel portion 130 may be, for example, 100 cm ² or more.

The manifold inlet 110 is connected to the supply side flow path 120, and raw material fluid can flow in. At this time, the supply side passage portion 120 may supply the raw material fluid flowing in from the manifold inlet 110.

The manifold inlet 110 may include one inlet hole.

The discharge-side flow path portion 140 may be connected to the other side of the channel portion 130 to form a plurality of flow paths through which reactants are discharged.

Additionally, the discharge-side flow path portion 140 may be provided with a discharge-side flow path block 141 that branches out into multiple flow paths.

In addition, the discharge-side flow path portion 140 may be formed in a shape corresponding to the shape of the supply-side flow path portion 120. That is, the branched flow path shape of the discharge-side flow path portion 140 may be the same as the branched flow path shape of the supply-side flow path portion 120.

The manifold outlet 150 is connected to the discharge side flow path 140 so that reactants can be discharged.

Here, the reactant may be carbon monoxide (CO) or ethylene (C2H4).

The manifold outlet 150 may include one discharge hole.

The flow path plate 100 for an electrolysis cell according to the first embodiment of the present invention configured as described above is a flow path plate 100 for an electrolysis cell facing the electrode E, and has a plurality of branched flow paths for supplying raw material fluid. In the supply side passage portion 120 where (123) is formed, a branch passage 123 is formed to have a uniform passage width through a plurality of passage blocks 121, thereby forming a channel portion 130 through which the raw material fluid moves. The raw material fluid can be supplied to flow uniformly through the plurality of channels 131. Accordingly, the fluid flow of reactants is improved, improving the mass transfer characteristics required for electrochemical reactions, optimizing performance efficiency, and improving durability by preventing local deterioration.

Euro plate for electrolysis cell according to the second embodiment

Hereinafter, a flow path plate for an electrolysis cell according to a second embodiment of the present invention will be described.

Figure 4 is a plan view illustrating a flow path plate for an electrolysis cell according to a second embodiment of the present invention, and Figure 5 is an enlarged view of a part of the supply side flow path portion in the flow path plate for an electrolysis cell according to a second embodiment of the present invention. This is a floor plan shown.

Referring to FIGS. 1, 4, and 5, the flow path plate 200 for an electrolysis cell according to the second embodiment of the present invention is a flow path plate 200 for an electrolysis cell facing the electrode E that causes an electrochemical reduction reaction. ), which is a flow path plate 200 for an electrolysis cell facing the electrode (E) that causes an electrochemical reduction reaction, a supply side flow path portion 220 for supplying the raw material fluid, and a plurality of channels through which the supplied raw material fluid moves ( 131) includes a formed channel portion 130. In addition, the flow path plate 200 for an electrolysis cell according to the second embodiment of the present invention may include a manifold inlet 110, a discharge side flow path portion 240, and a manifold outlet 150.

Compared to the flow path plate for an electrolysis cell according to the above-described first embodiment, the flow path plate 200 for an electrolysis cell according to an embodiment of the present invention has a branched flow path shape from the supply side flow path portion 220 to the flow path blocks 221 and 222. There is a difference. Therefore, this embodiment omits or briefly describes content that overlaps with the above-described embodiment, and focuses on the differences.

In more detail, in the flow path plate 200 for an electrolysis cell according to the second embodiment of the present invention, the supply side flow path portion 220 may be formed with a plurality of branched flow paths 223 that supply raw material fluid. Here, the raw material fluid may include carbon dioxide (CO2) and an electrolyte solution. At this time, the electrolyte solution may include water (H2O).

The supply side passage portion 220 is provided with a plurality of passage blocks 221 and 222, and the branch passage 223 may be branched into a plurality of passages through the plurality of passage blocks 221 and 222. At this time, the widths W23 and W24 of the plurality of branch passages 223 may be uniform. That is, the widths W23 and W24 of the plurality of branch passages 223 of the supply-side passage portion 220 may be the same. Here, the plurality of branched flow passages 223 may be portions of the flow passages facing the channel portion 130.

For example, the plurality of flow blocks 221 and 222 may have a circular or non-circular cross section. At this time, the plurality of flow blocks 221 and 222 may be specifically formed to have a circular cross-section, for example.

Also, the plurality of euroblocks 221 and 222 may be arranged in a plurality of rows. Here, the plurality of euroblocks 221 and 222 arranged in a plurality of rows may be arranged to be staggered from row to row. Accordingly, the plurality of flow blocks 221 and 222 are arranged in a plurality of rows, and the rows are staggered, so that fluid flow distribution can be more easily achieved.

At this time, the plurality of branch flow paths 223 are branch flow paths 223 in which the flow is distributed by the flow path blocks 221 in the row adjacent to the channel portion 130 in the flow path blocks 221 and 222 arranged in a plurality of rows. You can. That is, the branched branch flow path 223 may be a flow path that is finally distributed by the flow path block 221 located in the row closest to the channel unit 130, which is the last row in a plurality of rows. Meanwhile, for example, the number of branch passages 223 of the supply side passage portion 220 may be greater than the number of channels 131, but the flow passage for the electrolysis cell according to the second embodiment of the present invention The plate 200 is not necessarily limited here.

Additionally, the plurality of euroblocks 221 and 222 arranged in a plurality of rows may be arranged in two rows, for example. Here, the plurality of euroblocks 221 and 222 arranged in two rows are staggered from row to row, but may be arranged in a zigzag shape.

On the other hand, when a plurality of flow blocks 221 and 222 are arranged in two rows, the row closest to the channel part 130 is called row 1, and the row close to the manifold inlet 110 is called row 2. The spacing between the plurality of flow blocks 221 located in each row may be the same, and the spacing between the plurality of flow blocks 222 positioned in the second row may be the same. At this time, the spacing between the plurality of flow blocks 221 located in the first row and the spacing between the plurality of flow blocks 222 positioned in the second row may be equal to each other. Accordingly, it is possible to more easily distribute the flow of fluid evenly.

At this time, the widths W21 and W22 of the passage 224 distributed by the plurality of passage blocks 222 located in the second row may be the same. And, in the passage 224 distributed by the plurality of passage blocks 222 located in the second row, the width W21 of the passage located on both sides of the supply-side passage portion 220 is the width W22 of the remaining passages. can be formed in the same way.

One side of the channel portion 130 may be connected to the supply side flow path portion 220 to form a plurality of channels 131 through which the supplied raw material fluid, carbon dioxide, and electrolyte solution move.

The channel portion 130 faces the electrode E, and a plurality of channels 131 are formed on the surface of the channel portion 130 facing the electrode E, so that the raw material flows through the plurality of channels 131. The fluid comes into contact with the electrode (E) and an electrochemical reaction occurs at the electrode (E).

The channel portion 130 may have a plurality of channels 131 formed in a straight line so that the raw material fluid moves in a straight direction from one side where the supply-side passage portion 220 is located to the other side.

Also, for example, the width WC2 of the channel 131 may be larger than the widths W23 and W24 of the plurality of branch passages 223 of the supply-side passage portion 220.

The manifold inlet 110 is connected to the supply side flow path 220, and raw material fluid can flow in. At this time, the supply side passage portion 220 may supply the raw material fluid flowing in from the manifold inlet 110.

The manifold inlet 110 may include one inlet hole.

The discharge side passage portion 240 may be connected to the other side of the channel portion 130 to form a plurality of passages through which reactants are discharged.

The discharge-side flow path portion 240 may be formed in a shape corresponding to the shape of the supply-side flow path portion 220.

The manifold outlet 150 is connected to the discharge side flow path 240 so that reactants can be discharged.

Here, the reactant may be carbon monoxide (CO) or ethylene (C2H4).

The manifold outlet 150 may include one discharge hole.

Euro plate for electrolysis cell according to the third embodiment

Hereinafter, a flow path plate for an electrolysis cell according to a third embodiment of the present invention will be described.

Figure 6 is a plan view illustrating a flow path plate for an electrolysis cell according to a third embodiment of the present invention, and Figure 7 is an enlarged view of a portion of the supply side flow path portion in the flow path plate for an electrolysis cell according to a third embodiment of the present invention. This is a floor plan shown.

Referring to FIGS. 1, 6, and 7, the flow path plate 300 for an electrolysis cell according to the third embodiment of the present invention is a flow path plate 300 for an electrolysis cell facing an electrode (E) that causes an electrochemical reduction reaction. ), and includes a supply side flow path portion 320 for supplying the raw material fluid, and a channel portion 130 in which a plurality of channels 131 through which the supplied raw material fluid moves are formed. In addition, the flow path plate 300 for an electrolysis cell according to the third embodiment of the present invention may include a manifold inlet 110, a discharge side flow path portion 340, and a manifold outlet 150.

Compared with the flow path plate for an electrolysis cell according to the first and second embodiments described above, the flow path plate 300 for an electrolysis cell according to the third embodiment of the present invention has a flow path block ( 321), there is a difference in the form of Euro branching. Therefore, this embodiment omits or briefly describes content that overlaps with the above-described embodiments, and focuses on the differences.

In more detail, in the flow path plate 300 for an electrolysis cell according to the third embodiment of the present invention, the supply side flow path portion 320 may be formed with a plurality of branched flow paths 323 that supply raw material fluid. Here, the raw material fluid may include carbon dioxide (CO2) and an electrolyte solution. At this time, the electrolyte solution may include water (H2O).

The supply side passage portion 320 is provided with a plurality of passage blocks 321, and the branch passage 323 may be branched into a plurality of passages through the plurality of passage blocks 321. At this time, the widths (W31 and W32) of the plurality of branch passages 323 may be uniform. That is, the widths W31 and W32 of the plurality of branch passages 323 of the supply-side passage portion 320 may be the same. Here, indented grooves 320a are formed on both sides of the supply-side flow path 320, and the width W31 of the branch flow path 323 located on both sides of the supply-side flow path 320 is the supply side flow path. It can be formed to be the same as the width W32 of the remaining branch passage 323 of the portion 320.

Here, the plurality of branched flow passages 323 may be portions of the flow passages facing the channel portion 130.

For example, the plurality of flow blocks 321 may have a circular or non-circular cross section. At this time, the plurality of flow blocks 321 may be specifically formed, for example, in a diamond shape among non-circular shapes.

One side of the channel portion 130 may be connected to the supply side passage portion 320 to form a plurality of channels 131 through which carbon dioxide and electrolyte, which are supplied raw material fluids, move.

In addition, the channel portion 130 faces the electrode E, and a plurality of channels 131 are formed on the surface of the channel portion 130 facing the electrode E, so that the flow flows through the plurality of channels 131. The raw material fluid comes into contact with the electrode (E) and an electrochemical reaction occurs at the electrode (E).

In addition, the channel portion 130 may have a plurality of channels 131 formed in a straight line so that the raw material fluid moves in a straight direction from one side where the supply-side flow path portion 320 is located to the other side.

And, for example, the width (WC3) of the channel 131 may be larger or smaller than the widths (W31, W32) of the plurality of branch passages 323 of the supply-side passage portion 320, but the third channel of the present invention The flow path plate 300 for an electrolysis cell according to the embodiment is not necessarily limited here.

The manifold inlet 110 is connected to the supply side flow path 320, and raw material fluid can flow in. At this time, the supply side passage portion 320 may supply the raw material fluid flowing in from the manifold inlet 110.

The manifold inlet 110 may include one inlet hole.

The discharge-side flow path portion 340 may be connected to the other side of the channel portion 130 to form a plurality of flow paths through which reactants are discharged.

In addition, the discharge-side flow path portion 340 may be formed in a shape corresponding to the shape of the supply-side flow path portion 320. That is, the discharge-side flow path portion 340 may have the same flow path shape as that of the supply-side flow path portion 320.

The manifold outlet 150 is connected to the discharge side flow path 340 so that reactants can be discharged.

Here, the reactant may be carbon monoxide (CO) or ethylene (C2H4).

The manifold outlet 150 may include one discharge hole.

Electrolysis cell according to embodiments

Hereinafter, an electrolysis cell according to an embodiment of the present invention will be described.

Referring to Figures 1 to 3, an electrolysis cell (Cell) 1000 according to an embodiment of the present invention includes a flow path plate 100 and an electrode (E) facing the flow path plate 100. Here, the flow path plate 100 is a flow path plate 100 for an electrolysis cell facing the electrode E that causes an electrochemical reduction reaction, and includes a supply side flow path portion 120 that supplies the raw material fluid, and the supplied raw material fluid moves. It includes a channel portion 130 in which a plurality of channels 131 are formed. Additionally, the flow path plate 100 may include a manifold inlet 110, a discharge side flow path portion 140, and a manifold outlet 150. Meanwhile, the electrolysis cell 1000 according to an embodiment of the present invention may further include an ion exchange membrane (I).

The electrolysis cell 1000 according to an embodiment of the present invention relates to an electrolysis cell 1000 including a flow path plate for an electrolysis cell according to the above-described first to third embodiments. Therefore, in this embodiment, content that overlaps with the embodiments of the flow plate for electrolysis cells according to the above-described first to third embodiments is omitted or briefly described, and the description is focused on the differences.

In more detail, the electrode E may face the flow path plate 100 to cause an electrochemical reduction reaction. At this time, the electrode E can, for example, electrolyze carbon dioxide (CO2) into carbon monoxide (CO) or ethylene (C2H4).

Meanwhile, the electrode E may include an anode A and a cathode C.

In the flow path plate 100, the supply side flow path portion 120 may be formed with a plurality of branch flow paths 123 that supply raw material fluid. Here, the raw material fluid may include carbon dioxide (CO2) and an electrolyte solution. At this time, the electrolyte solution may include water (H2O). The supply side passage portion 120 is provided with a plurality of passage blocks 121, and the branch passage 123 may be branched into a plurality of passages through the plurality of passage blocks 121. At this time, the widths (W1, W2) of the plurality of branch passages 123 may be uniform. That is, the widths (W1, W2) of the plurality of branch passages 123 of the supply-side passage portion 120 may be the same. Here, the plurality of branched flow passages 123 may be portions of the flow passages facing the channel portion 130.

One side of the channel portion 130 may be connected to the supply side flow path portion 120 to form a plurality of channels 131 through which the supplied raw material fluid, carbon dioxide, and electrolyte solution move. In addition, the channel portion 130 faces the electrode E, and a plurality of channels 131 are formed on the surface of the channel portion 130 facing the electrode E, so that the flow flows through the plurality of channels 131. The raw material fluid comes into contact with the electrode (E) and an electrochemical reaction occurs at the electrode (E).

Meanwhile, the area of the channel portion 130 may be, for example, 100 cm ² or more. Therefore, the electrolysis cell 1000 according to an embodiment of the present invention may have an active area of 100 cm ² or more.

Additionally, a plurality of flow path plates 100 may be provided to face the anode (A) and cathode (C), respectively.

The plurality of flow path plates 100 may include a first flow path plate (P1) facing the anode (A) and a second flow path plate (P2) facing the cathode (C).

Here, the flow path plates (100, 200, 300) for electrolysis cells according to the above-described first to third embodiments may be composed of at least one of the first flow path plate (P1) and the second flow path plate (P2). At this time, specifically, for example, the flow path plates (100, 200, 300) for electrolysis cells according to the above-described first to third embodiments may be the first flow path plate (P1), but the present invention is not necessarily limited thereto. , the second flow path plate (P2), or the first flow path plate (P1) and the second flow path plate (P2). (See Figures 2, 4, and 6)

An ion exchange membrane (I) (IEM) may be positioned between the anode (A) and the cathode (C). Here, the ion exchange membrane (I) allows ions to move between the anode (A) and the cathode (C).

Meanwhile, the electrolysis cell 1000 according to an embodiment of the present invention is stacked in that order: a first flow path plate (P1), anode (A), ion exchange membrane (I), cathode (C), and second flow path plate (P2). It can be.

<Manufacture Example 1>

A flow path plate for an electrolysis cell that electrolyzes carbon dioxide (CO2) through an electrochemical reduction reaction was manufactured. In addition, a flow path plate was provided to face the electrode where the electrochemical reduction reaction occurs.

The flow plate has a supply side flow path in which the flow path for supplying carbon dioxide and electrolyte is branched into multiple flow paths through a plurality of flow blocks, and one side is connected to the supply side flow path, so that the supplied carbon dioxide and electrolyte are moved. It was manufactured to include a channel portion in which a channel was formed. At this time, the width of each branched channel was manufactured to be uniform.

In addition, the flow path plate is connected to the supply side flow path, a manifold inlet through which carbon dioxide and electrolyte flows in, a discharge side flow path connected to the other side of the channel section to form a plurality of branch flow paths through which reactants are discharged, and a discharge side flow path. It was manufactured to further include a connected manifold outlet.

Meanwhile, the cross section of the channel block is formed in a circular shape, and the number and position of the plurality of branched flow paths in the supply side flow path are manufactured to correspond to the number and position of the plurality of channels in the channel part.

<Manufacture Example 2>

A plurality of flow paths were provided in two rows, except that the flow blocks located between the rows and rows were staggered, and the number of branch flow paths in the supply side flow path was greater than the number of channels in the channel part. A flow plate for the digestion cell was prepared.

<Manufacture Example 3>

The cross-section of the flow block is diamond-shaped, the number of branch flow paths in the supply-side flow path is formed to be less than the number of channels in the channel part, and the width of the branch flow paths located on both sides of the supply-side flow path is formed to be the same as the width of the remaining branch flow paths in the supply-side flow path. A flow path plate for an electrolysis cell was manufactured in the same manner as Preparation Example 1, except that indented grooves were formed on both sides of the supply side flow path as much as possible.

<Comparative Example 1>

The cross section of the flow block is diamond-shaped, the number of branch flow paths in the supply side flow path is less than the number of channels in the channel part, and each width of the multiple branch flow paths is formed unevenly, with the branch flow paths located on both sides of the supply side flow path. A flow path plate for an electrolysis cell was manufactured in the same manner as Preparation Example 1, except that the width was formed to be larger than the width of the remaining branch flow paths of the supply side flow path portion.

<Experimental Example 1>

Figure 8 is an image showing the flow velocity distribution in the flow path plate for an electrolysis cell according to Comparative Example 1, Figure 9 is an image showing the flow velocity distribution in the flow path plate for an electrolysis cell according to Preparation Example 1, and Figure 10 is an image showing the flow velocity distribution in the flow path plate for an electrolysis cell according to Preparation Example 2. This is an image showing the flow velocity distribution in the flow path plate for an electrolysis cell, and Figure 11 is an image showing the flow velocity distribution in the flow path plate for an electrolysis cell according to Preparation Example 3.

Figures 8 to 8 show the flow rate distribution of the fluid from the process of introducing the fluid of carbon dioxide and electrolyte into the manifold inlet of the flow plate for the electrolysis cell according to Comparative Example 1 and Preparation Examples 1 to 3 and discharging it through the discharge port. The image is shown in Fig. 11.

In addition, the fluid flow rate deviation in the channel portion measured in Experimental Example 1 is shown in Table 1 below.

Comparative Example 1 Manufacturing Example 1 Production example 2 Production example 3 Flow deviation (%) 8.45 2.99 2.96 4.40

When looking at the flow velocity distribution image of the channel portion of the flow plate of Comparative Example 1 shown in FIG. 8, the flow velocity in both parts appears in red, which is significantly high, and the flow velocity in some portions of the remaining portion appears in dark blue, which is relatively slow, so that the channel portion of the channel portion It can be seen that the liver flow rate is significantly non-uniform in Comparative Example 1. On the other hand, when looking at the flow velocity distribution images of the channel portion of the flow path plate of Preparation Example 1 shown in FIG. 9, the flow path plate of Preparation Example 2 shown in FIG. 10, and the flow path plate of Preparation Example 3 shown in FIG. 11, both sides and the remaining Since the flow rate appears uniformly in light blue in the portion, it can be seen that the flow rate between channels of the channel portion is remarkably uniform in Preparation Examples 1 to 3. Therefore, the shape and arrangement of the channel blocks branching the flow path in Comparative Example 1 are It can be seen that the flow rate is biased to some channels located on both edges due to non-uniformity, and the shape and arrangement of the channel blocks branching the flow paths in Manufacturing Examples 1 to 3 are uniform, so the flow rate in all channels is not biased to some channels. You can see that this is uniform.

In addition, when referring to Table 1, the flow rate deviation (%) was 8.45 in Comparative Example 1, which showed a large deviation, while the deviation was significantly less in Preparation Example 1, 2.99, 2.96 in Preparation Example 2, and 4.40 in Preparation Example 3. You can see that

Therefore, it can be seen that in the case of Preparation Example 1 and Preparation Example 2, the flow rate deviation between channels can be reduced by 74% compared to Comparative Example 1, and in the case of Preparation Example 3, it can be improved by 48%.

In the end, it can be seen that the flow distribution of reactants and products required for electrolysis of carbon dioxide in the flow path plates for electrolysis cells according to Preparation Examples 1 to 3 is significantly improved compared to the flow path plates for electrolysis cells according to Comparative Example 1.

Although the present invention has been described in detail through specific examples, this is for the purpose of specifically illustrating the present invention, and the post-processing device according to the present invention is not limited thereto. It can be said that various implementations are possible by those skilled in the art within the technical spirit of the present invention.

In addition, the specific scope of protection of the invention will be made clear by the appended claims.

100,200,300,500: Euro plate
110: Manifold inlet
120,220,320: Supply side flow department
121,221,222,321: Euroblock
123,223,323: Quarterly Euro
130: Channel part
131: channel
131a: channel projection
140,240,340: Discharge side flow path part
141,341: Discharge side Euroblock
150: Manifold outlet
320a: Indented groove
1000: electrolysis cell
A: Anode
C: cathode
E: electrode
I: Ion exchange membrane
P1: 1st euro plate
P2: Second Euro Plate

Claims (15)

A flow path plate for an electrolysis cell facing an electrode that causes an electrochemical reaction,
A supply-side flow path portion formed with a plurality of branched flow paths for supplying raw material fluid; and
It includes a channel portion connected to the supply side passage portion and one side portion to form a plurality of channels through which the supplied raw material fluid moves,
The supply-side flow path portion is provided with a plurality of flow blocks,
The branch flow path is branched into a plurality of channels through the plurality of flow blocks,
A flow path plate for an electrolysis cell wherein the width of each of the branch flow paths branched into a plurality is uniform. In claim 1,
The channel portion faces the electrode, and the plurality of channels are formed on a surface of the channel portion facing the electrode, so that the raw material fluid flowing through the plurality of channels contacts the electrode and undergoes electrochemical activity at the electrode. Euro plate for the electrolysis cell where the reaction takes place. In claim 1,
A flow path plate for an electrolysis cell wherein the number of branch flow paths of the supply side flow path portion corresponds to the number of channels. In claim 1,
A flow path plate for an electrolysis cell, wherein the positions of the plurality of branch flow paths of the supply side flow path portion and the positions of the plurality of channels of the channel portion correspond to each other. In claim 1,
A plurality of the channel blocks are a channel plate for an electrolysis cell in which the cross-section is formed in a circular shape. In claim 5,
A plurality of the Euroblocks are arranged in a plurality of rows,
A plurality of the euro blocks arranged in a plurality of rows are a flow plate for electrolysis cells in which the rows are staggered. In claim 1,
A flow path plate for an electrolysis cell wherein the plurality of flow blocks are formed in a non-circular cross section. In claim 1,
A passage plate for an electrolysis cell in which the width of the branch passages located on both sides of the supply-side passage portion is formed to be the same as the width of the remaining branch passages of the supply-side passage portion. In claim 1,
It is connected to the supply side flow path and further includes a manifold inlet through which the raw material fluid flows,
The supply side flow path portion is a flow path plate for an electrolysis cell that supplies the raw material fluid flowing from the manifold inlet. In claim 1,
A discharge side flow path portion connected to the other side of the channel portion to form a plurality of branch flow paths through which reactants are discharged; and
A flow path plate for an electrolysis cell further comprising a manifold outlet connected to the discharge side flow path portion. In claim 10,
The discharge-side flow path portion is a flow path plate for an electrolysis cell formed in a shape corresponding to the shape of the supply-side flow path portion. In claim 1,
The channel part
A flow path plate for an electrolysis cell in which a plurality of the channels are formed in a straight line so that the raw material fluid moves in a straight direction from one side where the supply side flow path is located to the other side. In claim 1,
The raw material fluid includes an electrolyte solution containing carbon dioxide (CO2) and water (H2O),
A flow path plate for an electrolysis cell in which the carbon dioxide is electrolyzed through an electrochemical reduction reaction at the electrode. A flow path plate for an electrolysis cell according to any one of claims 1 to 13; and
An electrolysis cell comprising the electrode facing the flow path plate. In claim 14,
The electrode includes an anode and a cathode,
The flow path plate is provided in plural numbers and faces the anode and the cathode, respectively,
An electrolysis cell further comprising an ion exchange membrane (IEM) positioned between the anode and the cathode.

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