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Carbon monoxide feed gas dehydrogenation separation purification process

A carbon monoxide and raw material gas technology, applied in the directions of carbon monoxide, hydrogen separation, using liquid contact hydrogen separation, etc., can solve the problems of carbon monoxide reaction reactor, flying temperature, etc., and achieve the effect of small circulation, simple operation and high hydrogen capacity

Active Publication Date: 2020-12-04
湖北浚然新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when the carbon monoxide content is high in this method, carbon evolution reaction is also easy to occur and cause the reactor to overheat. At the same time, the methanation reaction will consume the raw material carbon monoxide and generate methane

Method used

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  • Carbon monoxide feed gas dehydrogenation separation purification process
  • Carbon monoxide feed gas dehydrogenation separation purification process
  • Carbon monoxide feed gas dehydrogenation separation purification process

Examples

Experimental program
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Embodiment 1

[0047] Hydrogen absorption, preheating cyclohexane to 120°C and hydrogen absorption reaction with carbon monoxide raw material gas with a hydrogen volume ratio of 0.6% under the action of a ruthenium carbon catalyst, the reaction temperature is 120°C, and the volume ratio of carbon monoxide raw material gas to cyclohexane is 2000:1, the reaction space velocity is 3000h -1 , react to obtain hydrogen absorbing liquid and primary carbon monoxide treatment gas, and the primary carbon monoxide treatment gas is cooled to 30-50°C for gas-liquid separation, and the separated gas is carbon monoxide treatment gas.

[0048] For dehydrogenation, preheat the hydrogen absorbing liquid obtained in the hydrogen absorbing step to 160°C and then carry out dehydrogenation reaction under the action of ruthenium carbon catalyst. Gas-liquid separation is carried out after ~50°C, and the separated gas is purified hydrogen.

[0049] The purification and separation process of Examples 2 to 6 is the s...

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Abstract

The invention relates to a carbon monoxide feed gas dehydrogenation separation purification process which comprises the following two steps: hydrogen absorption: under the action of a hydrogen absorption catalyst, absorbing hydrogen from carbon monoxide raw material gas by adopting organic liquid to obtain hydrogen absorption liquid and carbon monoxide treatment gas, wherein the organic liquid isselected from at least one of cyclohexane, tetrahydronaphthalene, carbazole and ethyl carbazole, and dehydrogenation: dehydrogenating the hydrogen absorption liquid under the action of a dehydrogenation catalyst to obtain a dehydrogenation liquid and purified hydrogen. According to the technology, organic matter is used for hydrogen absorption and hydrogen desorption, the hydrogen content in the carbon monoxide treatment gas is low and is smaller than or equal to 85 ppm, the purity of purified hydrogen is larger than or equal to 98%, and the purified hydrogen can be recycled. The method is insensitive to the concentration of hydrogen in the feed gas and can be used for treating carbon monoxide feed gas with the hydrogen volume ratio not larger than 20%, and organic liquid is recycled.

Description

technical field [0001] The invention relates to a raw material gas separation and purification process, in particular to a carbon monoxide raw material gas dehydrogenation separation and purification process. Background technique [0002] Carbon monoxide raw material gas is a commonly used chemical raw material, but because it contains hydrogen, it needs to be separated and purified before use. [0003] At present, the removal methods of hydrogen in carbon monoxide mainly include catalytic oxidation, low temperature separation and methanation. [0004] Among them, the catalytic oxidation method uses a catalyst to selectively oxidize hydrogen to generate water. This method requires the introduction of additional oxygen, and carbon monoxide will also be oxidized to carbon dioxide during dehydrogenation. During deep dehydrogenation, carbon monoxide will be oxidized in large quantities, resulting in loss of raw materials, and Once the hydrogen content in the raw material gas is...

Claims

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Application Information

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IPC IPC(8): C01B3/52C01B32/40
CPCC01B3/52C01B32/40C01P2006/40
Inventor 石旭周张锋薛铮高杰杭艾关林孙睿雷张洁
Owner 湖北浚然新材料有限公司
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