Method for removing hydrogen through selective oxidation of CO gas mixture

A technology of selective oxidation and mixed gas, applied in the direction of carbon monoxide, etc., can solve the problems of low hydrogen removal rate and high CO loss rate, and achieve the effect of short diffusion path, reduced side reactions, and thin effective active layer

Active Publication Date: 2011-03-30
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 oxidation and hydrogen removal in the presence of carbon monoxide in the prior art, and a new method for selective oxidation and hydrogen removal of CO mixed gas is provided

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Catalyst preparation:

[0030] 30 grams of alumina sol (containing 25% alumina by mass ratio), 60 grams of 2% glycerin solution, and 0.5 grams of Span 80 were made into a slurry. Then add 0.5 grams of silica sol and 40 grams of γ-Al with a particle size of 80 microns or less to this mixture. 2 o 3 powder (specific surface area 200 m2 / g). After stirring for about ten minutes, add 0.8 g Ce 2 o 3 , 2.5 grams of barium oxide and 0.6 grams of iron oxide, and the obtained slurry was ball milled at room temperature for 4 hours so that the particle size was controlled below 10 microns. Spray the slurry onto MgAl with a particle size of 4mm 2 o 4 On the pellets, dry at 80°C for 2 hours, then heat up to 100°C and dry again for 2 hours, and finally bake at 1100°C for 6 hours to obtain a layered composite carrier. Scanning electron microscopy shows that the thickness of the coating (shell) is about 90 microns, the specific surface area of ​​the coating (shell) is 165 square ...

Embodiment 2

[0034] Catalyst preparation:

[0035] FeCl 2 and cerium chloride are dissolved in water according to the molar ratio of 1:0.5, and the above solution is impregnated in θ-Al 2 o 3 (solid-to-liquid ratio 1:2) powder, dried at 120°C for 4 hours, and calcined at 400°C for 4 hours. 40 grams of alumina sol (containing 15% alumina), 60 grams of 3% polyacrylamide solution, and 0.4 grams of betaine were made into slurry. Then add 0.3 g of silica sol, 40 g of θ-Al impregnated with Fe and Ce with a particle size of 80 microns or less to this mixture. 2 o 3 powder. After stirring for about ten minutes, add 2.0 g of 25% MgCl 2 As an aqueous solution, the resulting slurry was ball milled for 4 hours at room temperature to control the particle size below 10 microns. The slurry was sprayed onto α-Al2O3 pellets with a particle size of 4 mm, dried at 100°C for 4 hours, then heated to 130°C and dried again for 4 hours, and finally calcined at 900°C for 10 hours to obtain a layered composi...

Embodiment 3

[0039] Catalyst preparation:

[0040] With 45 grams of alumina sol (containing 25% aluminum oxide by mass ratio), 5 grams of 40% silica sol, 60 grams of 4% cyclodextrin solution, 2.0 grams of lanthanum oxide, 1.0 grams of hexadecyl trimethyl bromide ammonium to make a slurry. Then add 0.4 grams of manganese silicate, 0.3 grams of potassium carbonate and 40 grams of δ-Al with a particle size of 100 microns or less to this mixture. 2 o 3 pink. After stirring for about ten minutes, the resulting slurry was ball milled at room temperature for 3 hours to control the particle size below 8 microns. The slurry was sprayed onto mullite spheres with a particle size of 6 mm, dried at 100°C for 4 hours, then heated to 160°C and dried again for 2 hours, and finally calcined at 800°C for 4 hours to obtain a layered composite carrier. The scanning electron microscope shows that the thickness of the coating (shell) is about 40 microns, the specific surface area of ​​the coating (shell) is...

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Abstract

The invention relates to a method for removing hydrogen through selective oxidation of a CO gas mixture, mainly solving the technical problems of low hydrogen removal rate and high CO loss rate in the prior art. The invention adopts the following technical scheme: the CO gas containing hydrogen is utilized as the raw material, and the raw material is contacted with noble metal catalysts under the following conditions: the reaction temperature is 80-260 DEG C; the volume space velocity is 100-10000h-1; the molar ratio of oxygen to hydrogen is 0.5-10:1; and the reaction pressure is -0.08-5.0MPa, and the hydrogen in the raw material is oxidized into water, wherein the noble metal catalysts include (a) at least an active component from platinum metals; (b) at least an auxiliary agent from alkali metals, alkaline-earth metals, IB, IIB, VB, VIIB, VIII, IIIA, IVA or lanthanides; and (c) a layered composite carrier formed by the kernel of an inert carrier and a porous coating material shell combined with the kernel. The technical scheme better solves the problems and can be used in the industrial production for removing hydrogen through selective oxidation of the CO gas mixture.

Description

technical field [0001] The invention relates to a method for selective oxidation of CO mixed gas to remove hydrogen, in particular to a method for selective oxidation of raw material gas for CO coupling to prepare oxalate. 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. It...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B31/18C01B32/40
Inventor 刘俊涛王万民杨为民蒯骏
Owner CHINA PETROLEUM & CHEM CORP
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