Dehydrogenation catalyst for feed gas containing carbon monoxide, preparation method and application method thereof

A dehydrogenation catalyst, carbon monoxide technology, applied in the direction of carbon monoxide, metal/metal oxide/metal hydroxide catalyst, chemical instruments and methods, etc., can solve problems such as spontaneous combustion, and achieve good selectivity

Active Publication Date: 2009-09-30
HAISO TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the Pd / activated carbon catalyst is prone to spontaneous combustion during the preparation process

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Dissolve 5 grams of magnesium nitrate and 6 grams of zinc nitrate in 70 grams of water, then pour it into a beaker with 100 grams of alumina carrier, dry it after dipping, and roast it at 450 ° C for 2 hours, then put the carrier after roasting Add 70 g of a mixed solution made of 0.6 g of palladium chloride and 0.3 g of chloroplatinic acid for impregnation and adsorption, and roast at 480° C. to obtain a carbon monoxide feed gas dehydrogenation catalyst.

[0025] The catalyst uses 10% hydrogen containing H 2 -N 2 The mixed gas is reduced at 550°C for 8 hours, cooled to 180°C, and carbon monoxide gas source is introduced, and the space velocity is 3000h -1 , can convert 97%CO+1.6%H 2 +0.3%N 2 +1.1%O 2 The hydrogen in the tank is removed to 10ppm, the dehydrogenation rate is 99.94%, the outlet oxygen is 0.08%, and the loss of carbon monoxide is 0.44%.

Embodiment 2

[0027] Dissolve 15 grams of ammonium molybdate and 10 grams of ammonium paratungstate in 65 grams of 50% ammonia water, then pour it into a beaker with 100 grams of alumina carrier, dry it after dipping, and roast it at 550 ° C for 2 hours, and then put the roasted The carrier is put into 70 grams of palladium acetate solution for impregnation and adsorption, and the solution contains 3.3 grams of palladium acetate. After calcination at 550°C, the carbon monoxide raw material gas deoxidation catalyst can be prepared.

[0028] The catalyst uses hydrogen containing 30% H 2 -N 2 Mixed gas is reduced at 650°C for 8 hours, then cooled to 200°C, and carbon monoxide gas source is introduced, and the space velocity is 3000h -1 , can convert 37%CO+1.5%H 2 +60.5%N 2 +1%O 2 The hydrogen in the tank is removed to 30ppm, the dehydrogenation rate is 99.80%, the outlet oxygen is 0.1%, and the loss of carbon monoxide is 0.3%.

Embodiment 3

[0030] Dissolve 2 grams of butyl titanate in 80 grams of alcohol, then pour it into a beaker with 100 grams of alumina carrier, dry it after impregnation, and roast it at 600 ° C for 2 hours. Put the carrier after roasting into 4 grams 70 grams of solution prepared by zirconium tetrachloride is impregnated, dried after impregnation and roasted at 500°C for 2 hours, then the carrier after roasting is put into 75 grams of solution prepared with 2 grams of palladium chloride for impregnation and adsorption, and carbon monoxide is obtained after roasting at 550°C Feed gas dehydrogenation catalyst.

[0031] The catalyst uses 60% H 2 -N 2 Mixed gas is reduced at 450°C for 8 hours, then cooled to 230°C, and carbon monoxide gas source is introduced, and the space velocity is 2000h -1 , can convert 67%CO+3%H 2 +27.25%N 2 +1.75%O 2 The hydrogen in the tank is removed to 10ppm, the dehydrogenation rate is 99.93%, the outlet oxygen is 0.1%, and the loss of carbon monoxide is 0.3%.

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Abstract

The invention discloses a dehydrogenation catalyst for feed gas containing carbon monoxide, a preparation method and an application method thereof. The catalyst takes alumina as a carrier, palladium and / or platinum as an active component and 2 to 4 MOxes as an additive, M is sodium, potassium, magnesium, titanium, zirconium, vanadium, manganese, iron, nickel, cobalt, copper, molybdenum, tungsten or cerium, and components of the catalyst (calculated by carrier mass) are: 0.01 to 2 percent of the palladium and / or 0.01 to 1 percent of the platinum, and 1 to 2 percent of MOxes. The preparation method for the catalyst comprises the following steps that: firstly, an additive metal salt solution is used to impregnate the carrier; a palladium and / or platinum salt solution is used to impregnate the carrier after the carrier is dried and roasted; and the impregnated carrier is roasted at a temperature of between 450 and 850 DEG C to obtain the catalyst. Before the use, H2-N2 mixed gas containing more than 10 percent of hydrogen or pure hydrogen is activated by the catalyst at a temperature of between 450 and 650 DEG C. The catalyst can perform deep removal on less than 5 percent of hydrogen in the feed gas with the CO content of between 10 and 99 percent, the using temperature is between 100 and 300 DEG C, the space velocity is between 500 and 9,000h<-1>, the dehydrogenation rate is more than 99 percent, the content of outlet hydrogen is less than 100 ppm, and the loss of the carbon monoxide is less than 0.5 percent.

Description

technical field [0001] The invention relates to a dehydrogenation catalyst, in particular to a dehydrogenation catalyst used for a gas source containing carbon monoxide and its preparation and application method. Background technique [0002] At present, the dehydrogenation catalysts reported at home and abroad mainly include Pd / Al 2 o 3 、CoMo / Al 2 o 3 There are also dehydrogenation agents based on manganese-based metal oxides, but these catalysts or dehydrogenation agents are generally used for dehydrogenation purification of non-reducing gases such as high-purity nitrogen, high-purity oxygen, and carbon dioxide. [0003] A high-concentration carbon monoxide synthesis gas dehydrogenation catalyst is disclosed in Japanese Patent No. 29-2424, which is composed of Pd / activated carbon, and can dehydrogenate high-concentration carbon monoxide gas with a hydrogen content of <5%. In the catalyst, palladium chloride aqueous solution is impregnated on the carrier, and the opt...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/42B01J23/44B01J23/58B01J23/60B01J23/652B01J21/06B01J23/89B01J23/889B01J23/847B01J23/83B01J23/78B01J23/80B01J23/648C01B31/18C01B32/40
Inventor 孔渝华胡典明钱胜涛刘华伟张曼征刘应杰李仕禄王先厚吕植炎舒欣
Owner HAISO TECH
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