System and process for preparing green fuel by coupling biomass gasification with SOEC co-electrolysis

By coupling biomass gasification with SOEC co-electrolysis, and utilizing functional materials and heat exchange units, the problems of low hydrogen-to-carbon ratio and insufficient waste heat utilization in traditional biomass gasification have been solved, realizing the synthesis of efficient green fuels and improving energy efficiency.

CN122344486APending Publication Date: 2026-07-07浙江海畅气体股份有限公司
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Patent Information

Application Number
CN202610663565.0
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2026-05-14
Publication Date
2026-07-07

AI Technical Summary

Technical Problem

Traditional biomass gasification produces crude syngas with a low hydrogen-to-carbon ratio, requiring adjustment via water-gas shift reaction, resulting in low energy efficiency, significant carbon loss, and ineffective utilization of high-grade waste heat.

Method used

By coupling biomass gasification with SOEC co-electrolysis, functional materials are used to capture carbon dioxide. Combined with heat exchange units and regenerative oxidation units, hydrogen-carbon ratio regulation and energy cascade utilization are achieved, eliminating the water-gas conversion process and directly synthesizing green fuels.

Benefits of technology

It achieves high system integration, significantly improved energy efficiency, avoids carbon loss, flexibly adjusts the hydrogen-carbon ratio, and realizes efficient green fuel synthesis, which has both environmental and economic benefits.

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Abstract

The invention provides a system and a process for preparing green fuel by coupling biomass gasification and SOEC (solid oxide electrolytic cell) co-electrolysis, which are characterized in that a path for preparing synthesis gas by coupling biomass gasification and solid oxide electrolytic cell (SOEC) co-electrolysis is adopted, agricultural and forestry waste biomass is used as a raw material, an oxygen-CO2 adsorption functional material is adopted, and the green fuel is prepared by a one-step method. A gasification-adsorption integrated and SOEC co-electrolysis deep coupling system is constructed; the system comprises a gasification unit, a first heat exchange unit, a gas purification unit, a regeneration oxidation unit, an SOEC electrolysis unit and a fuel synthesis unit. Green electricity such as wind power and photovoltaic power serves as driving energy of an SOEC electrolysis unit, biomass oriented conversion, CO2 in-situ capture-functional material regeneration cycle and SOEC high-temperature co-electrolysis are integrated, and closed-loop reuse of system materials is achieved by means of heat gradient utilization; the synthesis gas with the specific hydrogen-carbon ratio is obtained by adjusting the inlet amount of water vapor in the system, so that green fuel is produced, the traditional water-gas conversion process is omitted in the whole process, the energy efficiency of the system is improved, carbon loss is avoided, and high-temperature energy consumption is reduced.
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