Method for realizing methanol/ethylene glycol co-production through coal chemical industry and green hydrogen coupling

Abstract

The invention relates to the field of carbon neutralization energy conservation and emission reduction, and particularly discloses a method for realizing methanol / ethylene glycol co-production through coal chemical industry and green hydrogen coupling. A device comprises a power generation system, an energy storage device, a water electrolysis hydrogen production device, a hydrogen storage device, a hydrogen compression device, a coal gasification device, an air separation device, a heat recovery device, a purification device, a gas separation device, a methanol device, an esterification device, a carbonylation device and a hydrogenation device. Through comprehensive utilization of a power generation system, the energy storage device, the water electrolysis hydrogen production device and the hydrogen storage device, green production and reliable supply of hydrogen are achieved, hydrogen generated by coal gasification is replaced, the carbon emission of coal-to-methanol and ethylene glycol is reduced, and the effective utilization rate of carbon elements in coal is increased.

Description

technical field [0001] The invention relates to the field of chemical industry, and belongs to a method for preparing methanol / ethylene glycol, in particular to a method for realizing methanol / ethylene glycol co-production through the coupling of coal chemical industry and green hydrogen. Background technique [0002] In recent years, with the rapid development of my country's polyester industry, my country's consumption of ethylene glycol continues to increase. Among them, coal-to-ethylene glycol is an important synthetic route for the production of ethylene glycol, and its capacity increase accounts for about 70% of the total new and expanded ethylene glycol production capacity. The current coal-to-ethylene glycol process is as follows: Coal reacts with high-pressure oxygen from the air separation unit to produce synthesis gas; the synthesis gas is divided into three strands, one strand is deeply transformed, acid gas is removed, and then sent to the PSA hydrogen productio...

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Problems solved by technology

[0004] Aiming at the problem of large carbon emissions in the current coal-to-ethylene glycol process, the present invention provides a method for realizing methanol / ethylene glycol co-production through the coupling of coal chemical industry and green hydrogen

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