TWI839510B - Dehydrogenation system and catalyst holding device - Google Patents

Abstract

An object of the invention is to provide a dehydrogenation system and the like which simplify the maintenance of components such as the catalyst and heater. The dehydrogenation system comprises a reaction vessel, and a catalyst holding device 20 having a resistance wire 21 which generates heat when supplied with power, a cylinder 27 which covers the side of the resistance wire 21, a catalyst cover section 33 which covers at least a portion of the side of the cylinder 27, and a catalyst 31 which is provided between the cylinder section 27 and the catalyst cover section 33 and activates the dehydrogenation reaction. An organic hydride is supplied from above the catalyst holding device 20. The catalyst cover section 33 has a hole through which the aromatic compounds and hydrogen generated by the dehydrogenation reaction can pass without allowing passage of the catalyst 31. The catalyst cover section 33 is positioned inside the reaction vessel, and the reaction vessel holds the catalyst holding device 20 in a state where the terminal 23 of the resistance wire 21 is partially exposed outside the reaction vessel.

Description

Dehydrogenation system, catalyst storage device

The present invention relates to a dehydrogenation system, etc.

In the past, as in Patent Document 1, a device including a dehydrogenation system has been proposed. [Prior Art Document] [Patent Document]

Patent document 1: Japanese Patent Publication No. 2002-184436

[Problem to be solved]

However, no special consideration has been given to the maintenance of the catalyst that activates the dehydrogenation reaction and the heater that heats the catalyst.

Therefore, the object of the present invention is to provide a dehydrogenation system that facilitates the maintenance of the catalyst and/or heater. [Means for solving the problem]

The dehydrogenation system of the present invention includes a reaction container and a catalyst storage device; the catalyst storage device has a resistance wire that generates heat by supplying electric power, a barrel covering the side of the resistance wire, a catalyst coating covering at least a portion of the side of the barrel, and a catalyst disposed between the barrel and the catalyst coating to activate the dehydrogenation reaction. The raw material is supplied from above the catalyst storage device of the reaction container. The catalyst coating has holes that allow the raw material, hydrogen generated by the dehydrogenation reaction, and substances after hydrogen is separated from the raw material to pass through without allowing the catalyst to pass through. The reaction container holds the catalyst storage device in a state where the catalyst coating is located on the inner side of the reaction container and a portion of the terminal of the resistance wire is exposed to the outside of the reaction container.

In this dehydrogenation system, the catalyst storage device can be easily removed from the reaction container, and the catalyst and/or heater (resistance wire, etc.) of the catalyst storage device can be easily repaired. In addition, since the resistance wire and the terminal through which the current flows are arranged in an area that does not contact the substances separated from the raw materials such as organic hydrides and aromatic compounds, and hydrogen, the resistance wire and/or the terminal are not easily deteriorated.

Preferably, a heat sink is provided on the cylinder portion for heat dissipation, and the heat sink is covered by the catalyst coating portion.

A more preferred situation is that the catalyst covering part is installed on the cylinder part in a removable state.

When the catalyst-coated portion is installed on the barrel portion in a removable state, the catalyst-coated portion can be easily removed from the barrel portion to replenish or replace the catalyst, or to replace the catalyst-coated portion.

More preferably, the dehydrogenation system further includes a spraying unit housed in the reaction container for spraying the raw material in a mist form.

By spraying the raw material, it can easily pass through the holes of the catalyst coating, so that the raw material can be supplied over a wide range, and the amount of the raw material supplied to the interior of the reaction container can be easily adjusted.

A more preferred situation is that the spraying unit sprays the raw material upward or obliquely upward.

When the raw material is sprayed upward or obliquely upward, the raw material can be sprayed slowly and in a wide range inside the reaction container at one time in the form of spraying the raw material upward, compared with the form of spraying the raw material downward.

In a more preferred embodiment, the dehydrogenation system further comprises a hydrogen extraction section for separating hydrogen generated in the reaction container from other substances. The hydrogen extraction section has a hydrogen separation membrane.

In a more preferred embodiment, the hydrogen extraction unit has a gas-liquid separator for separating the gas discharged from the reaction vessel into gas and liquid after cooling. The hydrogen separation membrane is arranged downstream of the gas-liquid separator in the gas flow, and separates hydrogen from other substances in the gas discharged from the gas-liquid separator.

The two-stage hydrogen extraction process using a gas-liquid separator and a hydrogen separation membrane can extract hydrogen with less impurities and higher purity than a method using only one of the gas-liquid separator and the hydrogen separation membrane.

In a more preferred embodiment, the dehydrogenation system further comprises a suction pump for sucking gas from the reaction container and guiding the gas to the hydrogen extraction part.

In a more preferred embodiment, the dehydrogenation system further comprises a gas exhaust pipe connecting the reaction container with the hydrogen extraction part. The gas exhaust pipe has a slope extending from the gas exhaust port of the reaction container in an oblique direction.

More preferably, the barrel is cylindrical and is rotatably mounted on the wall of the reaction container.

The catalyst storage device can be rotated to stir the catalyst filled between the cylinder and the catalyst covering part, or to adjust the position where the sprayed raw material penetrates.

In a more preferred embodiment, the dehydrogenation system further comprises a second reaction vessel. The raw material discharged from the reaction vessel and the substance after hydrogen is removed from the raw material are supplied from above the catalyst storage device of the second reaction vessel.

More preferably, the wall constituting the reaction container has an opening hole for allowing the catalyst retaining device to pass through when the catalyst retaining device is installed.

The catalyst storage device of the present invention comprises a resistance wire that generates heat by supplying electric power, a barrel covering the side of the resistance wire, a catalyst coating covering at least a portion of the side of the barrel, and a catalyst disposed between the barrel and the catalyst coating. The raw material is supplied from above the catalyst storage device in the reaction container. The catalyst coating has holes that allow the raw material, hydrogen generated by the dehydrogenation reaction, and substances after hydrogen has been separated from the raw material to pass through without allowing the catalyst to pass through. The catalyst storage device is held in the reaction container in a state where a portion of the terminal of the resistance wire is exposed to the outside of the reaction container. [Effect of the invention]

As described above, according to the present invention, a dehydrogenation system and the like that facilitates the maintenance of a catalyst and/or a heater can be provided.

[Form used to implement the invention]

The following is a diagram for explaining the first embodiment. In addition, the embodiments are not limited to the following embodiments. In principle, the contents described in one embodiment are also applicable to other embodiments. Furthermore, each embodiment and each variant can be combined as appropriate.

The dehydrogenation system 1 of this embodiment is a device that extracts hydrogen from organic hydrides (saturated condensed cyclopentane) such as methylcyclohexane and supplies the hydrogen to an external power generation device (not shown in the figure). The dehydrogenation system 1 includes a raw material (organic hydride) tank 5, a dehydrogenation reactor 10, a gas discharge pipe 50, a liquid discharge pipe 52, a suction pump 60, a hydrogen extraction unit 70, a hydrogen tank 81, a separation liquid tank 82, a detection unit 91, and a control unit 93 (refer to Figure 1).

(Raw material tank 5) Raw material tank 5 is a tank for storing organic hydrogen compounds. The organic hydrogen compounds stored in raw material tank 5 are supplied to spray section 43 of dehydrogenation reactor 10 through a raw material pump (not shown in the figure) to be separated into aromatic compounds such as toluene and hydrogen through dehydrogenation reaction in dehydrogenation reactor 10.

(Dehydrogenation reactor 10) The dehydrogenation reactor 10 has a catalyst storage device 20, a reaction container 41, and a spraying unit 43.

(Catalyst storage device 20) A plurality of catalyst storage devices 20 are provided to maintain the state of being in the reaction container 41. The catalyst storage device 20 is a device for storing the catalyst 31 and heating the catalyst 31 by electric heating, and is maintained in the reaction container 41. The catalyst storage device 20 has a resistor wire 21, a filler 22, a terminal (winding bobbin) 23, an insulating powder 24, an insulating member 25, a nut 26, a barrel (heating tube) 27, a heat sink 29, a resistor fixing member 30, a catalyst 31, a catalyst coating 33, and a coating fixing member 35 (see FIG. 2).

The resistance wire 21 is a nickel-chromium alloy wire or the like in a coil shape, and generates heat when electric power is supplied.

The terminal 23 is electrically connected to the resistor line 21 and is provided at both ends of the resistor line 21. The terminal 23 has a first end 23a, a second end 23b, and a middle portion 23c, and the first end 23a, the middle portion 23c, and the second end 23b form an integral body. The first end 23a is in a male thread shape in order to be screwed with the nut 26, and a portion is exposed from the barrel 27. The second end 23b is approximately cylindrical. A portion of the resistor line 21 is wound around the second end 23b and fixed by spot welding or the like. The middle portion 23c is clamped by the first end 23a and the second end 23b.

The portion of the terminal 23 exposed from the barrel 27 is exposed to the outside from the wall constituting the reaction container 41. The portion of the terminal 23 exposed from the barrel 27 is connected to a power supply line (cable, etc.) from a commercial power source. The resistance line 21 and the terminal 23 receive power supply from the commercial power source, etc. However, the power supply source is not limited to the commercial power source, and may also be a power generation device or a power storage device.

The barrel 27 holds the terminal 23 via the insulating member 25. Furthermore, the barrel 27 covers a portion of the terminal 23 and the side surface of the resistor line 21. The portion of the terminal 23 covered by the barrel 27 is the portion that is not exposed to the outside from the wall constituting the reaction container 41.

2 and 3 show the cross-section of the portion other than the resistor line 21, the terminal 23 and the nut 26, and show the side surfaces of the resistor line 21, the terminal 23 and the nut 26.

A heat sink 29 is provided on the side of the cylinder 27 for heat dissipation. The heat sink 29 is preferably installed on the side of the cylinder 27 in a removable state. The heat sink 29 radiates the heat generated by the resistor wire 21, heats the catalyst 31 close to it, and activates the dehydrogenation reaction.

The interior of the cylinder 27 is filled with an insulating powder 24 such as magnesium oxide, which is cured by compression and heat. The insulating powder 24 is filled to cover a portion of the first end 23a, the entire second end 23b, and the entire middle portion 23c. The portion of the insulating powder 24 facing the insulating member 25, that is, the boundary portion between the insulating powder 24 and the insulating member 25, and a portion of the male threaded portion of the first end 23a are filled with a filler 22 made of silicon or the like. The filler 22 forms a state in which a portion of the male threaded portion of the first end 23a is fixed to the insulating powder 24.

The nut 26 is screwed onto the first end portion 23a in a state where the insulating member 25 and the cylindrical portion 27 are sandwiched therebetween.

The portion of the catalyst storage device 20 that is not in electrical communication with the terminal 23 is held on the wall of the reaction container 41 by the resistor fixing member 30. The portion of the catalyst storage device 20 that is not in electrical communication with the terminal 23 is considered to be the vicinity of both ends of the barrel portion 27 of the terminal 23 held by the insulating member 25. The resistor fixing member 30 is formed of an insulating member at least in the area in contact with the barrel portion 27, and the barrel of the barrel portion 27 is held in a clamping manner. The resistor fixing member 30 is fixed to the wall of the reaction container 41 by screws or the like to seal the first opening hole 41a and the second opening hole 41b of the wall, thereby sealing the reaction container 41 and the catalyst storage device 20.

In order to release the fixing of the terminal 23 to the reaction container 41 by the resistor fixing member 30, the terminal 23 can be rotated around the axis extending from the resistor wire 21, and the cylinder 27 is cylindrical, and the catalyst storage device 20 is preferably held in the reaction container 41 in a rotatable state. At this time, the catalyst storage device 20 can be rotated to stir the catalyst 31 filled between the cylinder 27 and the catalyst coating 33, or adjust the position where the sprayed organic hydride enters.

(Catalyst 31, catalyst coating 33, coating fixing member 35) The catalyst 31 is composed of platinum or platinum salt that promotes dehydrogenation reaction. The area marked with × in Figures 2 and 3 is the area filled with the catalyst 31.

The catalyst covering portion 33 is disposed around the cylinder 27 between the two ends of the cylinder 27 held in the reaction container 41, so that the catalyst covering portion 33 is located inside the reaction container. The catalyst covering portion 33 covers a portion of the cylinder 27, the heat sink 29 mounted on the cylinder 27, and the catalyst 31. The catalyst 31 is stored between the outer wall of the cylinder 27 and the inner wall of the catalyst covering portion 33. The catalyst covering portion 33 has holes that do not allow the catalyst 31 (particles) to pass through, but allow the organic hydride, aromatic compound and hydrogen to pass through. The catalyst covering portion 33 is composed of, for example, a sheet-like porous membrane.

It is ideal that the catalyst coating 33 is removably mounted on the cylinder 27 by means of the coating fixing member 35. The mounting of the catalyst coating 33 to the cylinder 27 by means of the coating fixing member 35 may be performed by fastening with a band or welding or other welding methods.

Therefore, by releasing the installation of the catalyst covering portion 33 on the cylinder portion 27 by the covering portion fixing member 35, the catalyst 31, the catalyst covering portion 33, and the portion other than the covering portion fixing member 35 of the catalyst storage device 20 can be maintained in their original state, and at least one of the catalyst 31, the catalyst covering portion 33, and the covering portion fixing member 35 can be replaced with a new one.

The catalyst storage device 20 is a structure in which a catalyst 31 and a catalyst coating 33 are mounted on a resistor including a resistor line 21 via a coating fixing member 35 .

(Catalyst 31 filling procedure) The catalyst 31 is filled between the catalyst coating 33 and the cylinder 27 by the following procedure. One end of the catalyst coating 33 is mounted on one end of the cylinder 27 (one end between the heat sink 29 and the insulating member 25) using the coating fixing member 35 (refer to FIG. 3). At this time, the other end of the cylinder 27 (the other end between the heat sink 29 and the wall of the insulating member 25) is not mounted using the coating fixing member 35, and a catalyst insertion opening OP is formed between the catalyst coating 33 and the cylinder 27. The catalyst 31 is introduced between the catalyst covering part 33 and the cylinder 27 through the catalyst introducing opening OP while the catalyst covering part 33 and/or the cylinder 27 are kept in a state in which the catalyst introducing opening OP is facing approximately upward. It is ideal to uniformly arrange the catalyst 31 between the cylinder 27 and the catalyst covering part 33 by vibrating or rotating the cylinder 27 and the catalyst covering part 33. After the catalyst 31 is introduced, the other end of the covering part fixing member 35 is mounted on the other end of the cylinder 27 (the other end between the heat sink 29 and the insulating member 25). Thereby, the catalyst 31 is stored between the cylinder 27 and the catalyst covering part 33 in a state in which it can contact the heat sink 29.

(Reaction container 41) The reaction container 41 is a container for promoting the dehydrogenation reaction of the raw material (organic hydrogen compound) sprayed from the spraying section 43 into hydrogen and aromatic compounds by the catalyst storage device 20 (see FIG. 1). The wall constituting the reaction container 41 holds a plurality of catalyst storage devices 20. The wall constituting the reaction container 41 has a first opening hole 41a and a second opening hole 41b. In order to allow the catalyst storage device 20 to pass through when the catalyst storage device 20 is installed on the wall, the first opening hole 41a is a hole shape larger than the maximum diameter portion of the catalyst storage device 20. In this embodiment, the first opening hole 41a is in the shape of a hole through which the catalyst coating portion 33 of the maximum diameter portion can pass. The second opening hole 41b is in the shape of approximately the same as the outer shape of the cylinder 27 in order to hold the cylinder 27.

Furthermore, the spraying part 43 is maintained inside the reaction container 41. In addition, an opening (gas outlet 45) for discharging the gas obtained by the dehydrogenation reaction is provided on the side of the wall constituting the reaction container 41. Furthermore, an opening (liquid outlet 47) for discharging the liquid is provided below the wall constituting the reaction container. In addition, the gas outlet 45 may also be provided on the top of the wall constituting the reaction container 41.

(Spraying section 43) The spraying section 43 is provided inside the reaction container 41, and sprays the raw material (organic hydride) supplied from the raw material tank 5 in the form of mist. The spraying section 43 may be in a form of spraying the raw material downward, or may be in a form of spraying the raw material upward or obliquely upward as shown in FIG. 4. When the raw material is sprayed upward or obliquely upward, the raw material can be sprayed slowly and in a wide range inside the reaction container 41 at one time, compared with the form of spraying the raw material downward. A plurality of catalyst storage devices 20 are arranged below the spraying section 43.

By spraying the organic hydride, the organic hydride can be easily supplied through the holes of the catalyst coating portion 33, and the amount of the organic hydride supplied to the inside of the reaction container 41 can be easily adjusted. However, the supply of the organic hydride from the top of the catalyst storage device 20 is not limited to the spraying using the spraying portion 43, and the organic hydride can also be made to flow into the catalyst storage device 20 from the top.

(Gas exhaust pipe 50) One end of the gas exhaust pipe 50 is connected to the gas exhaust port 45. The other end of the gas exhaust pipe 50 is connected to the hydrogen extraction part 70. The gas exhaust pipe 50 is provided with a suction pump 60 for sucking gas from the reaction container 41 and guiding it to the hydrogen extraction part 70. It is ideal to provide an oblique slope 50a at one end of the gas exhaust pipe 50 so that the gas such as hydrogen sucked by the suction pump 60 can flow easily. Figure 1 shows an example of a gas exhaust pipe 50 having an oblique slope 50a extending obliquely downward from the gas exhaust port 45. Figure 4 shows an example of a gas exhaust pipe 50 having an oblique slope 50a extending obliquely upward from the gas exhaust port 45. The gas generated in the reaction container 41 is sucked by the suction pump 60 and supplied to the hydrogen extraction part 70 through the gas exhaust pipe 50. The gas generated in the reaction container 41 contains hydrogen, vaporized organic hydrides, vaporized aromatic compounds, etc.

As shown in Fig. 1 and Fig. 4, the suction pump 60 may be provided between the reaction vessel 41 and the first separation portion 71, between the first separation portion 71 and the second separation portion 72, or between the second separation portion 72 and the hydrogen tank 81. Furthermore, the suction pump 60 may be provided at two or more locations, namely, between the reaction vessel 41 and the first separation portion 71, between the first separation portion 71 and the second separation portion 72, or between the second separation portion 72 and the hydrogen tank 81.

(Liquid discharge pipe 52) One end of the liquid discharge pipe 52 is connected to the liquid discharge port 47. The other end of the liquid discharge pipe 52 is connected to the separation liquid tank 82. In the reaction container 41, the liquid flowing to the bottom of the catalyst storage device 20 passes through the liquid discharge pipe 52 and is supplied to the separation liquid tank 82.

(Hydrogen extraction section 70) The hydrogen extraction section 70 has a first separation section 71 and a second separation section 72.

The first separation section 71 includes a cooling device and a gas-liquid separator. The cooling device of the first separation section 71 is composed of a cooling device and the like, and cools the gas from the reaction vessel 41. The gas-liquid separator of the first separation section 71 separates the substance cooled by the cooling device of the first separation section 71 into liquid and gas. The liquid (liquefied organic hydrogen and liquefied aromatic compound) separated by the first separation section 71 is supplied to the separation liquid tank 82. The gas (hydrogen, unliquefied organic hydrogen, unliquefied aromatic compound, and impurities) separated by the first separation section 71 is supplied to the second separation section 72.

The second separation section 72 has a hydrogen separation membrane for separating hydrogen from other substances other than hydrogen. In order to separate hydrogen from other substances in the gas discharged from the gas-liquid separator of the first separation section 71, the hydrogen separation membrane of the second separation section 72 is arranged downstream of the gas flow relative to the gas-liquid separator of the first separation section 71. The hydrogen separated by the second separation section 72, that is, the hydrogen passing through the hydrogen separation membrane, is supplied to the hydrogen tank 81. Substances other than hydrogen separated by the second separation section 72, that is, substances that do not pass through the hydrogen separation membrane, are supplied to the separation liquid tank 82 or other tanks (not shown in the figure).

The two-stage hydrogen extraction process using the gas-liquid separator of the first separation section 71 and the hydrogen separation membrane of the second separation section 72 can extract hydrogen with less impurities and higher purity, compared to a method using only one of the gas-liquid separator and the hydrogen separation membrane.

(Hydrogen tank 81) The hydrogen tank 81 stores hydrogen generated in the reaction vessel 41 and extracted by the hydrogen extraction unit 70. The hydrogen tank 81 can also be connected to the power generation device (not shown in the figure) in a state where hydrogen can be supplied. The power generation device generates electricity based on the hydrogen supplied from the hydrogen tank 81, and supplies the electricity to the power storage device (not shown in the figure) and/or the electrical equipment (not shown in the figure). In addition, it is also possible to provide a form in which the hydrogen extracted by the hydrogen extraction unit 70 is directly supplied to the power generation device without providing the hydrogen tank 81.

(Separation liquid tank 82) The separation liquid tank 82 stores substances other than hydrogen (organic hydrides, aromatic compounds, etc.) discharged from the reaction vessel 41.

(Detector 91, control unit 93) The detector 91 is a temperature sensor or the like, which is disposed inside the reaction vessel 41 and near the catalyst storage device 20 to obtain information about the temperature near the catalyst storage device 20. The control unit 93 controls the electrical equipment constituting the dehydrogenation system 1, such as the catalyst storage device 20, the spray unit 43, and the suction pump 60. In particular, the control unit 93 adjusts the power supply to the catalyst storage device 20 based on the information about the temperature near the catalyst storage device 20 obtained by the detector 91. The heat generation of the resistance wire 21 is adjusted by adjusting the power supply to the catalyst storage device 20. Thereby, the amount and/or timing of the raw material (organic hydride) sprayed from the spraying section 43 and the amount and/or timing of the gas sucked by the suction pump 60 can be adjusted while the dehydrogenation reaction is activated.

(Hydrogen extraction procedure) Next, the hydrogen extraction procedure using the dehydrogenation system 1 of the present embodiment will be described. The catalyst storage device 20 and the spray section 43 are installed in advance in the reaction container 41. The raw material tank 5 is connected to the spray section 43. The gas discharge port 45 of the reaction container 41 is installed with a gas discharge pipe 50, and the liquid discharge pipe 52 is installed with a liquid discharge port 47 of the reaction container 41. The gas discharge pipe 50 is installed with a suction pump 60, a hydrogen extraction section 70, and a hydrogen tank 81. The liquid discharge pipe 52 is installed with a separation liquid tank 82.

The control unit 93 supplies power to the catalyst storage device 20 using a commercial power source. As a result, the resistance wire 21 generates heat, and the heat of the resistance wire 21 is transferred to the heat sink 29 via the insulating powder 24 and the barrel 27. The catalyst 31 is heated by the heat from the barrel 27 and the heat sink 29. When the catalyst 31 reaches a predetermined temperature (e.g., 350°C), it is in a state where the dehydrogenation reaction can be activated. When the control unit 93 determines that the catalyst 31 has reached the predetermined temperature based on information from the detection unit 91 or the time elapsed after the start of power supply to the catalyst storage device 20, the control unit 93 starts spraying the organic hydride by the spray unit 43. After the spraying of the organic hydride by the spraying section 43 begins, the control section 93 starts the operation of the suction pump 60 after a predetermined time has passed. A portion of the organic hydride sprayed from the spraying section 43 passes through the holes of the catalyst coating section 33 of the catalyst storage device 20 and contacts the catalyst 31. At this time, the organic hydride is separated into hydrogen and aromatic compounds by dehydrogenation reaction. The organic hydride, aromatic compounds and hydrogen are discharged from between the cylinder 27 of the catalyst storage device 20 and the catalyst coating section 33 through the holes of the catalyst coating section 33. The gas in the reaction container 41 among the substances discharged from the catalyst coating part 33 is pumped by the suction pump 60 and sent to the hydrogen extraction part 70 through the gas discharge pipe 50. The liquid in the reaction container among the substances discharged from the catalyst coating part 33 is sent to the separation liquid tank 82 through the liquid discharge pipe 52.

In the first separation section 71 of the hydrogen extraction section 70, the gas is cooled and separated into gas (mainly hydrogen) and liquid (mainly organic hydride and aromatic compound). The gas separated by the first separation section 71 is sent to the second separation section 72. The liquid separated by the first separation section 71 is sent to the separation liquid tank 82.

In the second separation section 72 of the hydrogen extraction section 70, hydrogen is separated into hydrogen that passes through the hydrogen separation membrane and other substances that do not pass through the hydrogen separation membrane. The hydrogen separated by the second separation section 72 is sent to the hydrogen tank 81. Substances other than hydrogen separated by the second separation section 72 are sent to the separation liquid tank 82 (or other tanks).

The hydrogen produced in the reaction vessel 41 is stored in the hydrogen tank 81. The organic hydrogen compound and the aromatic compound are stored in the separation liquid tank 82.

(Effect) The catalyst storage device 20 is held in the reaction container 41 while the catalyst 31 is stored between the cylinder 27 and the catalyst covering portion 33 and a portion of the terminal 23 (a portion of the first end portion 23a) is exposed from the reaction container 41. Therefore, in the dehydrogenation system 1, the catalyst storage device 20 can be easily removed from the reaction container 41, and the catalyst and/or heater (resistance wire 21, etc.) of the catalyst storage device 20 can be easily repaired. In addition, since the resistance wire 21 and the terminal 23 through which the current flows are arranged in an area that does not contact the organic hydride, aromatic compound, and hydrogen, it is not easy to deteriorate the resistance wire 21 and/or the terminal 23. Furthermore, when the heat sink 29 is provided, the catalyst 31 is arranged between the cylinder 27, the heat sink 29 and the catalyst covering portion 33. Compared with the configuration without the heat sink 29, the catalyst 31 can be easily arranged at four places in the region between the cylinder 27 and the catalyst covering portion 33, and the heat can be easily transferred to four places of the catalyst 31. When the catalyst covering portion 33 is installed in the cylinder 27 in a removable state, the catalyst covering portion 33 can also be easily removed from the cylinder 27 to replenish or replace the catalyst 31, or to replace the catalyst covering portion 33.

In addition, in the present embodiment, a form in which only one reaction container 41 is provided is described, but a form in which two or more reaction containers are provided may also be provided (see FIG. 5 ). Specifically, a reaction container (second reaction container) 41 is provided at the rear section of the separation liquid tank 82, and the substances (organic hydrogen compounds and aromatic compounds) stored in the separation liquid tank 82 are used as raw materials to carry out a dehydrogenation reaction. That is, the raw materials discharged from the reaction container 41 at the front section and the substances after hydrogen is separated from the raw materials are supplied from above the catalyst storage device 20 of the second reaction container. In addition, in FIG. 5 , the illustration of the hydrogen tank 81 and the separation liquid tank 82 provided at the rear section of the second reaction container 41 is omitted. Furthermore, a reaction vessel (third reaction vessel) 41 may be provided in which the substances (organic hydride and aromatic compound) stored in the separation liquid tank 82 after the second dehydrogenation reaction are subjected to a third dehydrogenation reaction. By conducting the dehydrogenation reaction in multiple steps, the amount of hydrogen generated inside each reaction vessel 41 can be suppressed, and the hydrogen-containing gas can be easily discharged from the gas discharge pipe 50.

In addition, in the present embodiment, the raw material of the dehydrogenation system 1 is a cyclic hydrocarbon, and the substance after dehydrogenation is an aromatic compound. However, other substances (hydrogen-containing compounds) that are dehydrogenated using a catalyst 31 may be used as raw materials. For example, ethanol, methanol, and chain hydrocarbons may be used as raw materials for the dehydrogenation system 1, and ammonia may also be used as raw materials for the dehydrogenation system 1.

Several embodiments of the present invention are described, and these embodiments are provided as examples and are not intended to limit the scope of the invention. These embodiments can be implemented in various other forms, and various omissions, substitutions, and changes can be made without departing from the gist of the invention. These embodiments and their variations are included in the scope and gist of the invention, and are also included in the invention described in the scope of the patent application and its equivalent.

1: Dehydrogenation system 5: Raw material (organic hydride) tank 10: Dehydrogenation reactor 20: Catalyst storage device 21: Resistor wire 22: Filler 23: Terminal (winding shaft) 23a: First end 23b: Second end 23c: Middle part 24: Insulating powder 25: Insulating member 26: Nut 27: Cylinder 29: Heat sink 30: Resistor fixing member 31: Catalyst 33: Catalyst coating part 35: Coating Part fixing member 41: reaction container 41a: first opening hole 41b: second opening hole 43: spray part 45: gas outlet 47: liquid outlet pipe 50: gas outlet pipe 50a: slope part 52: liquid outlet pipe 60: suction pump 70: hydrogen extraction part 71: first separation part 72: second separation part 81: hydrogen tank 82: separation liquid tank 91: detection part 93: control part OP: opening for catalyst input

FIG. 1 is a structural diagram of a dehydrogenation system of the present embodiment. FIG. 2 is a cross-sectional structural diagram of a catalyst storage device. FIG. 3 is a cross-sectional structural diagram of a catalyst storage device when the catalyst is filled through an opening. FIG. 4 is a structural diagram of a dehydrogenation system including a spraying portion for spraying upward and a slope portion extending obliquely upward from a reaction container, which is a variation of the present embodiment. FIG. 5 is a structural diagram of a dehydrogenation system further provided with a second reaction container.

20: Catalytic storage device

21:Resistor wire

22: Filler

23: Terminal (coil)

23a: 1st end

23b: Second end

23c: Middle part

24: Insulation powder

25: Insulation components

26: Nut

27: Cylinder

29: Heat sink

30: Resistor fixing component

31: Catalyst

33: Catalyst coating part

35: Covering part fixing member

41:Reaction container

41a: 1st opening hole

41b: Second opening hole

Claims (13)

A dehydrogenation system comprises: a reaction container; and a catalyst storage device, which has: a resistance wire, which generates heat by supplying power; a barrel, which covers the side of the resistance wire; a catalyst coating, which covers at least a part of the side of the barrel; and a catalyst, which is arranged between the barrel and the catalyst coating, and is used to activate the dehydrogenation reaction; The raw material is supplied from the top, and the catalyst-coated portion has holes that allow the raw material, hydrogen generated by the dehydrogenation reaction, and substances after hydrogen has been separated from the raw material to pass through without allowing the catalyst to pass through. The catalyst-coated portion is located inside the reaction container, and a portion of the terminal of the resistance line is exposed to the outside of the reaction container. The reaction container holds the catalyst storage device. As in claim 1, the dehydrogenation system, wherein a heat sink is provided on the cylinder portion for heat dissipation, and the heat sink is covered by the catalyst coating portion. A dehydrogenation system as claimed in claim 1 or 2, wherein the catalyst coating is mounted on the cylinder in a removable state. The dehydrogenation system of claim 1 or 2 further comprises: a spraying section housed in the reaction container for spraying the raw material into a mist form. A dehydrogenation system as claimed in claim 4, wherein, the spraying section sprays the raw material upward or obliquely upward. The dehydrogenation system of claim 1 or 2 further comprises: a hydrogen extraction section for separating hydrogen generated in the reaction vessel from other substances; the hydrogen extraction section has a hydrogen separation membrane. As in claim 6, the dehydrogenation system, wherein the hydrogen extraction section has a gas-liquid separator for separating the gas discharged from the reaction vessel into gas and liquid after cooling; the hydrogen separation membrane is arranged downstream of the gas flow relative to the gas-liquid separator to separate hydrogen from other substances in the gas discharged from the gas-liquid separator. The dehydrogenation system of claim 6 further comprises: a suction pump that sucks the gas from the reaction container and guides it to the hydrogen extraction part. The dehydrogenation system of claim 8 further comprises: a gas exhaust pipe connecting the reaction container with the hydrogen extraction part; the gas exhaust pipe has a slope extending from the gas exhaust port of the reaction container in an oblique direction. A dehydrogenation system as claimed in claim 1 or 2, wherein the barrel is cylindrical and is rotatably mounted on the wall constituting the reaction vessel. The dehydrogenation system of claim 1 or 2 further comprises: A second reaction container; the raw material discharged from the reaction container and the substance after hydrogen has been separated from the raw material are supplied from above the catalyst storage device in the second reaction container. A dehydrogenation system as claimed in claim 1 or 2, wherein the wall constituting the reaction container has an opening hole, and the opening hole is used to allow the catalyst storage device to pass through when the catalyst storage device is installed. A catalyst storage device comprises: a resistance wire that generates heat by supplying electric power; a barrel that covers the side of the resistance wire; a catalyst covering portion that covers at least a portion of the side of the barrel; and a catalyst that is disposed between the barrel and the catalyst covering portion; a raw material is supplied from above the catalyst storage device in a reaction container, the catalyst covering portion has holes that allow the raw material, hydrogen generated by a dehydrogenation reaction, and a substance after hydrogen has been separated from the raw material to pass through without allowing the catalyst to pass through, and the catalyst storage device is maintained in the reaction container in a state where a portion of the terminal of the resistance wire is exposed to the outside of the reaction container.

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