System and method for hydrogen production coupled with liquid carbon dioxide capture from carbonaceous material gasification

By using a system of high-pressure gasification reactor and high-pressure multiphase separator, and utilizing metal sintered microporous tube filtration and density difference separation, efficient carbon dioxide capture is achieved during hydrogen production, solving the problem of high carbon emissions in coal-to-hydrogen production and reducing energy consumption and costs.

CN117550555BActive Publication Date: 2025-10-17INST OF COAL CHEM CHINESE ACAD OF SCI
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Patent Information

Application Number
CN202311496643.5
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2023-11-10
Publication Date
2025-10-17
Estimated Expiration
2043-11-10

AI Technical Summary

Technical Problem

Existing coal-to-hydrogen processes emit large amounts of carbon dioxide during hydrogen production, resulting in high costs and high carbon emissions, making it difficult to achieve large-scale development of low-carbon hydrogen energy.

Method used

A system employing a high-pressure gasification reactor, a heat recovery heat exchanger, a high-pressure multiphase separator, and a high-pressure swing adsorption device achieves efficient capture of liquid carbon dioxide through density difference separation via filtration using sintered metal microporous tubes and the high-pressure multiphase separator.

Benefits of technology

While producing hydrogen, carbon dioxide is effectively captured, reducing the energy consumption for carbon dioxide separation, reducing carbon emissions, and lowering the cost of hydrogen production.

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Abstract

The present application relates to a system and method for hydrogen production by gasification of carbon-containing substances coupled with liquid carbon dioxide capture, in which coal, biomass, organic solid waste and other carbon-containing substances are converted into high-pressure hydrogen-rich gas with high hydrogen content by regulating organic matter gasification, carbon monoxide shift and low-carbon hydrocarbon steam reforming reactions in high-pressure gasification reactors at high temperature and high pressure in water, and separated in a high-pressure multiphase separator according to the density differences of the hydrogen-rich gas, liquid carbon dioxide and water, and the liquid carbon dioxide is captured, thereby effectively reducing the energy consumption of carbon dioxide separation. The hydrogen is purified by pressure swing adsorption at high pressure, the adsorbent capacity is large, the processing capacity of the adsorption tower is high, and high-pressure product hydrogen is obtained, which can save investment and reduce energy consumption.
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