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Selective catalytic oxidative dehydrogenation method for CO mixed gas

A technology of selective catalytic oxidation and mixed gas, applied in the direction of carbon monoxide, etc., can solve the problems of high CO loss rate and low hydrogen removal rate, and achieve good technical effects

Active Publication Date: 2012-08-29
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The technical problem to be solved by the present invention is the technical problem of high CO loss rate and low hydrogen removal rate in the process of selective catalytic oxidation removal of hydrogen in the presence of carbon monoxide in the prior art, and a new CO mixed gas selective catalytic oxidation removal of hydrogen is provided Methods

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Catalyst preparation:

[0018] Weigh 100 grams of alumina carrier whose specific surface area is 50 square meters per gram, according to 0.5% Pd / Al 2 o 3 The content of the catalyst is configured as follows: select palladium nitrate, prepare an impregnation solution according to the palladium load, impregnate the alumina carrier in the solution for 10 hours, and dry it in vacuum at room temperature for 12 hours to obtain a solid. The solid was then dried at 120°C for 4 hours to obtain the desired 0.5% Pd / Al 2 o 3 catalyst.

[0019] The catalyst prepared above is in the pretreatment gas atmosphere of 5% (remainder nitrogen) in oxygen content, is 200 ℃ at temperature, and volume space velocity is 800 hours -1 , under the condition of 0.5MPa, the pressure was treated for 35 hours; then, the CO gas with a hydrogen content of 1.2% was used as a raw material, and the molar ratio of hydrogen in oxygen and raw materials was 0.85:1, and the reaction temperature of the reacto...

Embodiment 2

[0021] Prepare 0.7%Pd / Al according to the catalyst preparation method of [Example 1] 2 o 3 catalyst.

[0022] The prepared catalyst is 300°C at a temperature of 300° C. and a volume space velocity of 1500 hours in a pretreatment gas atmosphere with an oxygen content of 30% (remainder nitrogen). -1 , under the condition of 0.8MPa, the pressure was treated for 30 hours; then, the CO gas with a hydrogen content of 2.5% was used as a raw material, and the molar ratio of hydrogen in oxygen and raw materials was 2:1, and the reaction temperature of the reactor was 180°C. Speed ​​is 1800 hours -1 , under the condition that the reaction pressure is 2.2MPa, the reaction result is: the loss rate of CO is 0.6%, and the hydrogen content in the reaction effluent is 2ppm.

Embodiment 3

[0024] Prepare 1.1%Pd / Al according to the catalyst preparation method of [Example 1] 2 o 3 catalyst.

[0025] The prepared catalyst is in the pretreatment gas atmosphere of 50% (remainder nitrogen) in oxygen content, is 380 ℃ at temperature, and volume space velocity is 8500 hours -1, pressure is under the condition of 1.8MPa, handles 2 hours; Then, be that the CO gas of 0.4% hydrogen content is raw material, the mol ratio of hydrogen in oxygen and raw material is 4.5: 1, reactor reaction temperature 210 ℃, volume empty Speed ​​is 5000 hours -1 , under the condition that the reaction pressure is 0.05MPa, the reaction result is: the loss rate of CO is 0.66%, and the content of hydrogen in the reaction effluent is 0.

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Abstract

The invention relates to a selective catalytic oxidative dehydrogenation method for CO mixed gas. According to the method, the technical problems of the prior art of low hydrogen desorption rate and high CO loss rate are solved. The method comprises the following steps of: treating a catalyst taking platinum metals as active components for 0.01-40 hours under a pretreatment gas atmosphere containing 1-100% oxygen and under the conditions of temperature at 100-400 DEG C, hourly space velocity at 100-10000 per hour and pressure at 0-2.0MPa, and then taking the CO mixed gas containing more than 0-10% of hydrogen as the raw material, and contacting the raw material with the catalyst through a reactor filled with the catalyst taking platinum metals as active components, under the conditions of mole ratio of oxygen to hydrogen in the raw material being (0.5-5):1, reaction temperature at 100-300 DEG C, hourly space velocity at 100-10000 per hour and reaction pressure at -0.08-5.0MPa, thereby hydrogenating the hydrogen in the reacted effluent into water. According to the technical scheme, the problems are more efficiently solved. The method is suitable for the industrial production of oxidative dehydrogenation of the CO mixed gas.

Description

technical field [0001] The invention relates to a method for selective catalytic oxidation of CO mixed gas to remove hydrogen, in particular to a method for oxidative removal of raw material gas of CO coupling oxalate ester. Background technique [0002] Oxalate is an important organic chemical raw material, which is widely used in the fine chemical industry to produce various dyes, medicines, important solvents, extractants and various intermediates. In the 21st century, oxalate, as a degradable and environmentally friendly engineering plastic monomer, has received extensive international attention. In addition, oxalic acid can be obtained by normal pressure hydrolysis of oxalate, and oxalamide can be obtained by normal pressure ammonia solution. Oxalate can also be used as a solvent to produce pharmaceutical and dye intermediates, etc., such as various condensation reactions with fatty acid esters, cyclohexylacetophenone, amino alcohols, and many heterocyclic compounds. ...

Claims

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Application Information

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IPC IPC(8): C01B31/18C01B32/40
Inventor 刘俊涛张琳娜李蕾
Owner CHINA PETROLEUM & CHEM CORP
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