JPH05161845A - Regenerating method for adsorbent - Google Patents
Regenerating method for adsorbentInfo
- Publication number
- JPH05161845A JPH05161845A JP3328668A JP32866891A JPH05161845A JP H05161845 A JPH05161845 A JP H05161845A JP 3328668 A JP3328668 A JP 3328668A JP 32866891 A JP32866891 A JP 32866891A JP H05161845 A JPH05161845 A JP H05161845A
- Authority
- JP
- Japan
- Prior art keywords
- adsorbent
- alumina
- type
- gas
- silica
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
Landscapes
- Solid-Sorbent Or Filter-Aiding Compositions (AREA)
- Treating Waste Gases (AREA)
- Separation Of Gases By Adsorption (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、吸着剤の加熱再生法に
関する。詳しくは、産業活動からの排出される有害ガ
ス、特に窒素酸化物、硫黄酸化物、アンモニア、塩素、
フッ素、塩化水素等の無機ガスを吸着処理できる吸着剤
の加熱再生方法に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for regenerating an adsorbent by heating. Specifically, harmful gases emitted from industrial activities, especially nitrogen oxides, sulfur oxides, ammonia, chlorine,
The present invention relates to a method for heating and regenerating an adsorbent capable of adsorbing an inorganic gas such as fluorine or hydrogen chloride.
【０００２】[0002]
【従来の技術】近年、産業活動から排出される有害ガス
による産業公害が社会問題として取り上げられている。
これらのガスのうち低濃度で排出されるような場合、処
理ガス量が多量となるため、通常の触媒等による処理方
法では経済的、時間的に大きな負担となり実用上適して
いない。2. Description of the Related Art In recent years, industrial pollution due to harmful gas emitted from industrial activities has been taken up as a social problem.
When these gases are discharged at a low concentration, the amount of treated gas becomes large, and thus a treatment method using a usual catalyst or the like imposes a heavy economical and time burden and is not suitable for practical use.
【０００３】このような低濃度の有害ガスの処理方法と
して、吸着剤を用いた有害ガスの処理方法が有効な手段
として考えられている。この方法を用いることにより、
大量の有害ガスを吸着剤に接触させ、有害ガスを吸着
し、次いで吸着剤を加熱し、吸着した有害ガスを脱離さ
せ、高濃度となった有害ガスを触媒等の化学的方法によ
り処理しうることが提案されている。As a method of treating such a low concentration of harmful gas, a method of treating harmful gas using an adsorbent is considered as an effective means. By using this method,
A large amount of harmful gas is brought into contact with the adsorbent, the harmful gas is adsorbed, the adsorbent is then heated, the adsorbed harmful gas is desorbed, and the high-concentration harmful gas is treated by a chemical method such as a catalyst. It is proposed that
【０００４】また、このような吸着剤を用いた処理方法
では、吸着剤の再生処理が不可欠であり、この再生方法
としては、一般的に加熱再生法が行なわれている。しか
し、吸着剤の吸着容量を向上するように吸着剤に改良を
加えると脱離性が低下し、そのため脱離温度も高くな
り、再生ガスの温度をかなりの高温にまで昇温しなくて
はならないという問題点が生じ、経済的に不利であっ
た。Further, in such a treatment method using an adsorbent, a regeneration treatment of the adsorbent is indispensable, and a heating regeneration method is generally used as this regeneration method. However, if the adsorbent is modified so as to improve the adsorption capacity of the adsorbent, the desorption property decreases, so the desorption temperature also rises, and the temperature of the regenerated gas must be raised to a considerably high temperature. There was a problem that it did not happen, which was economically disadvantageous.
【０００５】また、有害ガスを吸着剤から完全に脱離さ
せないと、２回目以降の吸着能が極端に低下し再生使用
回数が減少するという問題点があった。従って、低温で
再生できる吸着能の低い吸着剤を用い頻繁に加熱再生を
行なう方法が従来用いられて来た。Further, if the harmful gas is not completely desorbed from the adsorbent, the adsorbing ability after the second time is extremely lowered, and the number of times of recycle use is reduced. Therefore, a method of frequently performing heat regeneration using an adsorbent having a low adsorption capacity that can be regenerated at low temperature has been conventionally used.
【０００６】[0006]
【発明が解決しようとする課題】本発明の目的は、有害
ガスの吸着容量の大きい吸着剤の再生法において、比較
的低温で再生可能であり経済的にも優れた吸着剤の再生
法を提供することにある。SUMMARY OF THE INVENTION An object of the present invention is to provide a method of regenerating an adsorbent having a large adsorption capacity for harmful gas, which is reproducible at a relatively low temperature and is economically excellent. To do.
【０００７】[0007]
【課題を解決するための手段】本発明者らは上記目的の
解決のため鋭意研究の結果、再生ガス中に炭素数が２〜
４の炭化水素を含有させ、この炭化水素を吸着剤で燃焼
させることにより、上記目的が達成できることを見出し
発明を完成した。Means for Solving the Problems As a result of intensive research for solving the above-mentioned object, the present inventors have found that the number of carbon atoms in the regenerated gas is 2 to 2
It was found that the above object can be achieved by containing the hydrocarbon of No. 4 and burning this hydrocarbon with an adsorbent, and completed the invention.
【０００８】さらに詳しくは、本発明は、有害ガスを吸
着し、その吸着力の低下した吸着剤を再生するに際し、
炭素数が２〜４の炭化水素を含有するガスを該吸着剤に
通過させ、該吸着剤上で燃焼させ吸着剤を再生すること
を特徴とする吸着剤の再生方法である。More specifically, the present invention, when adsorbing a harmful gas and regenerating an adsorbent having a reduced adsorbing power,
A method for regenerating an adsorbent, characterized in that a gas containing a hydrocarbon having 2 to 4 carbon atoms is passed through the adsorbent and burned on the adsorbent to regenerate the adsorbent.
【０００９】この吸着剤にＰｔ、Ｐｄ、Ｖ、Ｃｒ、Ｍ
ｎ、Ｆｅ、Ｃｏ、Ｎｉ、Ｃｕ、Ｍｏ、Ｌａ及びＣｅから
なる群から選ばれた少なくとも一種類の金属酸化物又は
硫酸塩を添加することが好ましい。Pt, Pd, V, Cr, and M are added to this adsorbent.
It is preferable to add at least one metal oxide or sulfate selected from the group consisting of n, Fe, Co, Ni, Cu, Mo, La and Ce.
【００１０】本発明で使用される炭素数２〜４の炭化水
素とは、例えばエタン、エチレン、プロパン、プロピレ
ン、ブタン、ブチレン等の常温でガス状となるものをい
うが、場合によっては、メタノール、エタノール、プロ
パノール等のアルコール類、アセトン等のケトン類、ホ
ルムアルデヒド、アセトアルデヒド等のアルデヒド類等
の含酸素炭化水素及びそれらの混合物も使用でき、これ
らのうち好ましくは液化石油ガス（ＬＰＧ）である。The hydrocarbon having 2 to 4 carbon atoms used in the present invention means, for example, ethane, ethylene, propane, propylene, butane, butylene, etc. which become gaseous at room temperature, but in some cases methanol , Alcohols such as ethanol and propanol, ketones such as acetone, oxygen-containing hydrocarbons such as aldehydes such as formaldehyde and acetaldehyde, and mixtures thereof can be used. Of these, liquefied petroleum gas (LPG) is preferable.
【００１１】これらの炭化水素は、分子状酸素を含有す
るガスと混合し、再生用ガスとして用いられる。この分
子状酸素とは、酸素、空気、または酸素を反応に不活性
なガス、例えば、窒素、アルゴン、ヘリウム等のガスに
より希釈したガスをいい、これらのうち、コスト、取扱
い性等を考慮すると、本発明には空気を使用することが
好ましい。These hydrocarbons are mixed with a gas containing molecular oxygen and used as a regeneration gas. The molecular oxygen is oxygen, air, or a gas inert to the reaction, such as nitrogen, argon, a gas diluted with a gas such as helium, among these, considering the cost, handleability, etc. It is preferable to use air for the present invention.
【００１２】再生ガスにおいての炭素数２〜４の炭化水
素の濃度は、吸着物質、吸着量等のより適宜変更でき限
定されるものではないが、好ましくは有害ガスの脱離温
度及び吸着剤の熱安定性から１００〜１００００ｐｐｍ
好ましくは２００〜５０００ｐｐｍで使用される。The concentration of the hydrocarbon having 2 to 4 carbon atoms in the regenerated gas is not limited as it can be appropriately changed depending on the adsorbing substance, the adsorbed amount and the like, but is preferably the desorption temperature of the harmful gas and the adsorbent. 100 to 10,000 ppm from thermal stability
It is preferably used at 200 to 5000 ppm.
【００１３】本発明で行なわれる再生法における吸着剤
入口の再生ガス温度は、吸着剤上で炭化水素が燃焼しは
じめる温度でさえあれば良く吸着剤の成分、炭化水素の
種類にもよるが、１００℃〜４００℃、好ましくは２０
０℃〜３５０℃である。The temperature of the regeneration gas at the adsorbent inlet in the regeneration method of the present invention may be any temperature at which hydrocarbons start to burn on the adsorbent, and it depends on the components of the adsorbent and the types of hydrocarbons. 100 ° C to 400 ° C, preferably 20
It is 0 ° C to 350 ° C.
【００１４】また、再生に要するの時間は、吸着剤に吸
着した有害ガスの種類若しくは吸着量、吸着剤の性質、
型状若しくは使用量、再生用ガスの濃度若しくは空間速
度等により適宜選択されるものである。Further, the time required for regeneration depends on the kind or adsorption amount of the harmful gas adsorbed on the adsorbent, the nature of the adsorbent,
It is appropriately selected depending on the shape or amount of use, the concentration of the regenerating gas, the space velocity, and the like.
【００１５】本発明の再生法が使用できる吸着剤は、通
常、有害ガスを吸着できるもの、例えば、ガンマー、デ
ルタ、イーター若しくはカイ型等のアルミナ、シリカ、
シリカゲル、アナターゼ若しくはルチル型のチタニア又
はジルコニア等の酸化物、ロー若しくはハイ−アルミナ
−シリカ、アルミナ−カルシア、アルミナ−マグネシ
ア、アルミナ−チタニア、アルミナ−ジルコニア、アル
ミナ−ボリア、アルミナ−チタニア−リン、シリカ−チ
タニア、シリカ−ジルコニア、シリカ−マグネシア、チ
タニア−ジルコニア又はチタニア−ボリア等の複合酸化
物、並びに活性炭、活性白土、カオリン、アスベスト、
セライト、モンモリロナイト、ベントナイト、ケイソウ
土、ケイソウ土−リン、Ａ型、Ｘ型、Ｙ型、Ｒ型、Ｓ型
若しくはＴ型等のゼオライト、モルデナイト又はフェサ
ライト等の天然物若しくはその類似の合成化合物等であ
る。これらのうち、好ましくは、ガンマー、デルタ、イ
ーター若しくはカイ型等のアルミナ、シリカ、ジルコニ
ア、ロー若しくはハイ−アルミナ−シリカ、アルミナ−
カルシア、アルミナ−マグネシア、アルミナ−ジルコニ
ア、チタニア−ジルコニア又はチタニア−シリカ等の複
合酸化物、並びに活性炭、活性白土、Ｙ型ゼオライト、
モルデナイト、フェリライト等の天然物若しくはその類
似の合成化合物である。さらに、好ましくは、ガンマ
ー、デルタ、イーター若しくはカイ型等のアルミナ、ジ
ルコニア、ロー若しくはハイ−アルミナ−シリカ、アル
ミナ−カルシア、アルミナ−マグネシア又はシリカ−チ
タニア等の複合酸化物、並びに活性白土、Ｙ型ゼオライ
ト若しくはモルデナイト等の天然物若しくはその類似の
合成物である。The adsorbent that can be used in the regeneration method of the present invention is usually an adsorbent capable of adsorbing harmful gas, for example, gamma, delta, eta or chi type alumina, silica,
Silica gel, anatase or rutile type oxides such as titania or zirconia, low or high-alumina-silica, alumina-calcia, alumina-magnesia, alumina-titania, alumina-zirconia, alumina-boria, alumina-titania-phosphorus, silica -Composite oxides such as titania, silica-zirconia, silica-magnesia, titania-zirconia or titania-boria, as well as activated carbon, activated clay, kaolin, asbestos,
Celite, montmorillonite, bentonite, diatomaceous earth, diatomaceous earth-phosphorus, A-type, X-type, Y-type, R-type, S-type or T-type zeolite, natural products such as mordenite or fesalite, or similar synthetic compounds thereof, etc. is there. Of these, preferred are gamma, delta, eta or chi type alumina, silica, zirconia, low or high-alumina-silica, alumina-
Complex oxides such as calcia, alumina-magnesia, alumina-zirconia, titania-zirconia or titania-silica, as well as activated carbon, activated clay, Y-type zeolite,
It is a natural product such as mordenite or ferrilite or a synthetic compound similar thereto. Further, preferably, a composite oxide such as gamma, delta, eta or chi type alumina, zirconia, rho or high-alumina-silica, alumina-calcia, alumina-magnesia or silica-titania, and activated clay, Y type. It is a natural product such as zeolite or mordenite or a similar synthetic product.
【００１６】これらの吸着剤は、適当な型状、球状、円
柱状、円筒状、ハニカム状等に成形し、使用することが
できるほか、通常触媒用の不活性担体に担持して使用す
ることもできる。These adsorbents can be used by molding them into a suitable shape, sphere, cylinder, cylinder, honeycomb or the like, or they can be usually used by supporting them on an inert carrier for a catalyst. Can also
【００１７】本発明の第２の発明としては、上記吸着剤
に炭化水素を効率よく燃焼できるものを含有させること
ができ、例えばＰｔ、Ｐｄ、Ｖ、Ｃｒ、Ｍｎ、Ｆｅ、Ｃ
ｏ、Ｎｉ、Ｃｕ、Ｍｏ、Ｌａ及びＣｅからなる群から選
ばれる少なくとも一種類の金属酸化物又は硫酸塩（以
下、添加成分という）であり、好ましくは、Ｐｔ、Ｐ
ｄ、Ｍｎ、Ｃｏ、Ｎｉ及びＣｕからなる群から選ばれる
少なくとも一種の金属酸化物又は硫酸塩である。これら
の添加成分を上記吸着剤に含有させることで、吸着剤上
で炭化水素が効率よく燃焼可能となり、吸着剤をより効
率よく再生する方法が可能となるものである。In a second aspect of the present invention, the adsorbent may contain a substance capable of efficiently burning hydrocarbons, for example, Pt, Pd, V, Cr, Mn, Fe, C.
At least one metal oxide or sulfate (hereinafter referred to as an additive component) selected from the group consisting of o, Ni, Cu, Mo, La and Ce, and preferably Pt or P
It is at least one metal oxide or sulfate selected from the group consisting of d, Mn, Co, Ni and Cu. By including these additional components in the adsorbent, hydrocarbons can be efficiently combusted on the adsorbent, and a method of regenerating the adsorbent more efficiently becomes possible.
【００１８】この添加成分の添加量は、上記吸着剤に対
し、０．１重量％〜５０重量％、好ましくは０．１重量
％〜１０重量％である。０．１重量％未満であるとき
は、炭化水素の燃焼効率が悪くなり、５０重量％を越え
るときは、有害ガスの吸着率が低下し、充分な吸着量を
得ようとすると吸着剤の量を多くしなければならず吸着
剤の価格が高くなる。The amount of the additive component added is 0.1% by weight to 50% by weight, preferably 0.1% by weight to 10% by weight, based on the adsorbent. When it is less than 0.1% by weight, the combustion efficiency of hydrocarbons is deteriorated, and when it exceeds 50% by weight, the adsorption rate of harmful gas is lowered, and the amount of the adsorbent is increased when an attempt is made to obtain a sufficient adsorption amount. Therefore, the price of the adsorbent becomes high.
【００１９】[0019]
【作用】本発明による再生法は再生ガス中に炭素数が２
〜４の炭化水素を含有させ、吸着剤上でこの炭素水素を
燃焼させることにより、吸着した有害ガスを脱離させ、
吸着剤を再生する方法である。In the regeneration method according to the present invention, the number of carbon atoms in the regeneration gas is 2
~ 4 hydrocarbons are contained and the adsorbed harmful gas is desorbed by burning this carbon hydrogen on the adsorbent,
This is a method of regenerating the adsorbent.
【００２０】即ち再生ガス中に含まれる炭化水素が吸着
剤中に含まれる燃焼活性点で燃焼を起こすことにより、
局部的に活性点の温度が急激に上昇し同一活性点で吸着
していた有害ガスや燃焼活性点に隣接する吸着活性点に
吸着していた有害ガスが脱離されると考えられる。That is, by causing the hydrocarbon contained in the regeneration gas to burn at the combustion active point contained in the adsorbent,
It is considered that the temperature of the active point rapidly rises locally and the harmful gas adsorbed at the same active point or the harmful gas adsorbed at the adsorbing active point adjacent to the combustion active point is desorbed.
【００２１】従がって、吸着活性点は、燃焼活性点と同
一であることが好ましいが、燃焼活性成分を吸着剤に高
度に分散させて、吸着活性点と隣接しあうことが望まし
いと考えられる。Therefore, it is preferable that the adsorption active point is the same as the combustion active point, but it is desirable that the combustion active component is highly dispersed in the adsorbent so as to be adjacent to the adsorption active point. Be done.
【００２２】[0022]
【発明の効果】本発明による吸着剤の再生法では、通常
高温ガスだけで再生を行なう場合よりも低いガス温度で
吸着剤の再生ができ、再生ガスを昇温する為のコストが
低くさらに装置の材質も耐熱性が要求されないことか
ら、経済的に優れた吸着剤の再生法である。また、吸着
していた有害ガスを完全に吸着剤から脱離させることが
できることから吸着剤を繰り返し使用することができ
る。According to the method for regenerating an adsorbent according to the present invention, the adsorbent can be regenerated at a lower gas temperature than in the case where regeneration is usually performed only with a high temperature gas, and the cost for raising the temperature of the regenerated gas is low and the apparatus is further reduced. Since the material is not required to have heat resistance, it is an economically excellent adsorbent regeneration method. Further, since the adsorbed harmful gas can be completely desorbed from the adsorbent, the adsorbent can be repeatedly used.
【００２３】[0023]
【実施例】以下、実施例を挙げて本発明を更に具体的に
説明する。EXAMPLES The present invention will be described in more detail below with reference to examples.
【００２４】吸着剤の調製および合成ガスの吸着手順 ガンマーアルミナ粉体（商品名Ａ−１１、住友化学工業
（株）製）５００ｇを、硝酸マンガン［Ｍｎ（ＮＯ3）2
・６Ｈ2Ｏ］７６２ｇ及び酢酸カルシウム［Ｃａ（ＣＨ3
ＣＯＯ）2・Ｈ2Ｏ］１２１ｇを溶解せしめた水溶液１リ
ットルに添加してスラリー状にした。これを、温浴上で
水分を蒸発させた後１００℃で１０時間乾燥し、次いで
５００℃で３時間焼成してＡｌ2Ｏ3−ＭｎＯ2−ＣａＯ
粉体を得た。この粉体に適量の水を添加しつつニーダで
よく混合した後、押出成型機で直径４ｍｍ長さ５ｍｍの
ペレット状に成型した。これらペレットを１００℃で１
０時間乾燥した後、５５０℃で５時間空気雰囲気下で焼
成した。このようにして得られた吸着剤の組成は、酸化
物として重量比でＡｌ2Ｏ3：ＭｎＯ2：ＣａＯ＝６５：
３０：５であった。また、この吸着剤の比表面積は１８
０ｍ2／ｇであり、また細孔容積は０．４８ｃｃ／ｇで
あった。Preparation of Adsorbent and Adsorption Procedure of Syngas 500 g of gamma-alumina powder (trade name A-11, manufactured by Sumitomo Chemical Co., Ltd.) was mixed with manganese nitrate [Mn (NO 3 ) 2
・ 6H 2 O] 762 g and calcium acetate [Ca (CH 3
121 g of COO) 2 · H 2 O] was added to 1 liter of a dissolved aqueous solution to form a slurry. The water was evaporated on a warm bath, dried at 100 ° C. for 10 hours, and then baked at 500 ° C. for 3 hours to form Al 2 O 3 —MnO 2 —CaO.
A powder was obtained. The powder was mixed well with a kneader while adding an appropriate amount of water, and then molded into a pellet having a diameter of 4 mm and a length of 5 mm by an extruder. 1 these pellets at 100 ℃
After drying for 0 hours, it was baked at 550 ° C. for 5 hours in an air atmosphere. The composition of the adsorbent thus obtained had a weight ratio of Al 2 O 3 : MnO 2 : CaO = 65:
It was 30: 5. The specific surface area of this adsorbent is 18
It was 0 m 2 / g and the pore volume was 0.48 cc / g.
【００２５】この吸着剤について、窒素酸化物の吸着性
能（ＮＯｘ除去率）を下記の方法より評価した。吸着剤
７２ｍｌを内径３０ｍｍのガラス製反応管に充填し下記
の表１の示す条件で合成ガスを吸着剤層に導入した。With respect to this adsorbent, the nitrogen oxide adsorption performance (NOx removal rate) was evaluated by the following method. 72 ml of the adsorbent was filled in a glass reaction tube having an inner diameter of 30 mm, and synthesis gas was introduced into the adsorbent layer under the conditions shown in Table 1 below.
【００２６】[0026]
【表１】 [Table 1]
【００２７】上記合成ガスを導入してから２０時間経過
後の上記吸着剤層の入口および出口における合成ガス中
の二酸化窒素（ＮＯ2）濃度を化学発光式ＮＯｘ計によ
り測定し、下記の式に従がってＮＯｘ除去率を算出し、
得られた結果を表３に示した。The nitrogen dioxide (NO 2 ) concentration in the synthesis gas at the inlet and the outlet of the adsorbent layer 20 hours after the introduction of the synthesis gas was measured by a chemiluminescence type NOx meter and calculated by the following formula. Therefore, calculate the NOx removal rate,
The obtained results are shown in Table 3.
【００２８】[0028]
【外１】 [Outer 1]
【００２９】実施例１ 図１において示す再生装置図の反応管（符号３の部分）
に、上記吸着手順により得られた窒素酸化物を２０時間
吸着した吸着剤を、充填し、あらかじめヒータ４で３５
０℃に昇温した空気とプロピレンを下記の表２の条件に
なるように調製した後、反応管に流し、吸着剤の再生を
行なった。Example 1 A reaction tube of the regenerator shown in FIG. 1 (a portion indicated by reference numeral 3)
Is filled with an adsorbent that has adsorbed the nitrogen oxides obtained by the above adsorption procedure for 20 hours, and the heater 4 is used for 35 hours.
Air and propylene heated to 0 ° C. were prepared so as to satisfy the conditions shown in Table 2 below, and then flown into a reaction tube to regenerate the adsorbent.
【００３０】[0030]
【表２】 [Table 2]
【００３１】再生を行なった吸着剤を、さらに前述した
条件と同一条件で窒素酸化物の吸着を行ない２０時間後
の吸着剤のＮＯｘ除去率を求めた。これらの手順をさら
に１０回吸着再生を繰り返し行なった後の吸着剤の窒素
酸化物の吸着能の変化を調べた。その結果を表３に示
す。The regenerated adsorbent was further adsorbed with nitrogen oxide under the same conditions as described above, and the NOx removal rate of the adsorbent after 20 hours was determined. After repeating these procedures 10 times by repeating the adsorption regeneration, the change in the adsorption capacity of the adsorbent for nitrogen oxides was examined. The results are shown in Table 3.
【００３２】比較例１ 実施例１において、プロピレンを導入しないほかは同一
の方法で、吸着剤の再生処理と窒素酸化物の吸着を行な
いＮＯｘ除去率を求めるとともに１０回吸着再生を繰り
返し行なった後の吸着剤の窒素酸化物の吸着能の変化を
実施例１と同様に測定した。その結果を表３に示す。Comparative Example 1 In the same manner as in Example 1, except that propylene was not introduced, the adsorbent was regenerated and the nitrogen oxide was adsorbed to obtain the NOx removal rate, and the adsorption regeneration was repeated 10 times. The change in the nitrogen oxide adsorption capacity of the adsorbent was measured in the same manner as in Example 1. The results are shown in Table 3.
【００３３】[0033]
【表３】 [Table 3]
【００３４】表３に示すようにプロピレンを添加した再
生法では、１０回吸着再生を繰り返してもＮＯｘ除去率
の変化は認められず完全に再生が行なわれているが、プ
ロピレンを添加しない再生法では、ＮＯｘ除去率の変化
が認められ吸着剤の吸着能が低下した。As shown in Table 3, in the regeneration method in which propylene is added, the NOx removal rate is not changed even after repeating adsorption and regeneration 10 times, and the regeneration is completely performed. Then, a change in the NOx removal rate was observed, and the adsorption capacity of the adsorbent decreased.
図１は、本発明に係る実施例及び比較例で用いた装置の
図である。図面の右側から有害ガスまたは再生用ガスを
流す。図面には便宜上、実施例に対応した態様であり、
炭素数が２〜４の炭化水素の１種であるプロピレンをバ
イパスより流入する状態を示すものである。FIG. 1 is a diagram of an apparatus used in Examples and Comparative Examples according to the present invention. Flow harmful gas or regeneration gas from the right side of the drawing. In the drawings, for convenience, a mode corresponding to the embodiment,
It shows a state where propylene, which is one of hydrocarbons having 2 to 4 carbon atoms, flows in from a bypass.
１．反応管 ２．保温材 ３．吸着剤 ４．ヒーター 1. Reaction tube 2. Heat insulation material 3. Adsorbent 4. heater
Claims (3)
た吸着剤を再生するに際し、炭素数が２〜４の炭化水素
を含有するガスを該吸着剤に通過させ、該吸着剤上で燃
焼させ吸着剤を再生することを特徴とする吸着剤の再生
方法。1. When adsorbing a harmful gas and regenerating an adsorbent having a reduced adsorptivity, a gas containing a hydrocarbon having 2 to 4 carbon atoms is passed through the adsorbent, and the adsorbent is adsorbed on the adsorbent. A method for regenerating an adsorbent, which comprises burning the adsorbent to regenerate it.
Ｆｅ、Ｃｏ、Ｎｉ、Ｃｕ、Ｍｏ、Ｌａ及びＣｅからなる
群から選ばれた少なくとも一種類の金属酸化物又は硫酸
塩を添加する請求項１記載の再生方法。2. An adsorbent containing Pt, Pd, V, Cr, Mn,
The regeneration method according to claim 1, wherein at least one metal oxide or sulfate selected from the group consisting of Fe, Co, Ni, Cu, Mo, La and Ce is added.
若しくはカイ型のアルミナ、シリカ、シリカゲル、アナ
ターゼ若しくはルチル型のチタニア又はジルコニアであ
る酸化物、ロー若しくはハイ−アルミナ−シリカ、アル
ミナ−カルシア、アルミナ−マグネシア、アルミナ−チ
タニア、アルミナ−ジルコニア、アルミナ−ボリア、ア
ルミナ−チタニア−リン、シリカ−チタニア、シリカ−
ジルコニア、シリカ−マグネシア、チタニア−ジルコニ
ア又はチタニア−ボリアである複合酸化物、並びに活性
炭、活性白土、カオリン、アスベスト、セライト、モン
モリロナイト、ベントナイト、ケイソウ土、ケイソウ土
−リン、モルデナイト、フェサライト又はＡ型、Ｘ型、
Ｙ型、Ｒ型、Ｓ型若しくはＴ型のゼオライトである天然
物若しくはその類似の合成物からなる群から選ばれるの
少なくとも一種を含有するものである請求項１又は２記
載の再生方法。3. Oxide, rho or high-alumina-silica, alumina-calcia, alumina whose adsorbent is gamma, delta, eta or chi type alumina, silica, silica gel, anatase or rutile type titania or zirconia. -Magnesia, alumina-titania, alumina-zirconia, alumina-boria, alumina-titania-phosphorus, silica-titania, silica-
Zirconia, silica-magnesia, titania-zirconia or titania-boria complex oxide, as well as activated carbon, activated clay, kaolin, asbestos, celite, montmorillonite, bentonite, diatomaceous earth, diatomaceous earth-phosphorus, mordenite, fesarite or A type, X type,
The regeneration method according to claim 1 or 2, which contains at least one selected from the group consisting of natural products which are Y-type, R-type, S-type, and T-type zeolites or synthetic products similar thereto.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP32866891A JP3165719B2 (en) | 1991-12-12 | 1991-12-12 | Adsorbent regeneration method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP32866891A JP3165719B2 (en) | 1991-12-12 | 1991-12-12 | Adsorbent regeneration method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH05161845A true JPH05161845A (en) | 1993-06-29 |
| JP3165719B2 JP3165719B2 (en) | 2001-05-14 |
Family
ID=18212835
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP32866891A Expired - Fee Related JP3165719B2 (en) | 1991-12-12 | 1991-12-12 | Adsorbent regeneration method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3165719B2 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005205368A (en) * | 2004-01-26 | 2005-08-04 | Kurita Water Ind Ltd | Adsorbent and water treatment method |
| US7666814B2 (en) * | 2003-03-03 | 2010-02-23 | Nippon Sheet Glass Company, Limited | Soil conditioner |
| CN110841725A (en) * | 2019-11-04 | 2020-02-28 | 上海环钻环保科技股份有限公司 | Microwave regeneration treatment method of carbon-based catalyst for simultaneous desulfurization and denitrification |
| CN117563556A (en) * | 2024-01-16 | 2024-02-20 | 北京北大先锋科技股份有限公司 | Renewable load-type desulfurizing agent and preparation method thereof |
-
1991
- 1991-12-12 JP JP32866891A patent/JP3165719B2/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7666814B2 (en) * | 2003-03-03 | 2010-02-23 | Nippon Sheet Glass Company, Limited | Soil conditioner |
| JP2005205368A (en) * | 2004-01-26 | 2005-08-04 | Kurita Water Ind Ltd | Adsorbent and water treatment method |
| CN110841725A (en) * | 2019-11-04 | 2020-02-28 | 上海环钻环保科技股份有限公司 | Microwave regeneration treatment method of carbon-based catalyst for simultaneous desulfurization and denitrification |
| CN117563556A (en) * | 2024-01-16 | 2024-02-20 | 北京北大先锋科技股份有限公司 | Renewable load-type desulfurizing agent and preparation method thereof |
| CN117563556B (en) * | 2024-01-16 | 2024-04-02 | 北京北大先锋科技股份有限公司 | Renewable load-type desulfurizing agent and preparation method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3165719B2 (en) | 2001-05-14 |
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