Green electricity consumption system and method for plasma-catalyzed CO2 hydrogenation to methanol synthesis

The method of synthesizing methanol by catalytic CO2 hydrogenation using plasma utilizes a jet plasma reaction tower and a multi-stage pressurization system to solve the problems of low conversion rate and poor adaptability of thermocatalytic technology, and achieves efficient and flexible CO2 to methanol conversion and green electricity consumption.

CN117563523BActive Publication Date: 2026-06-02ZHEJIANG UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
ZHEJIANG UNIV
Filing Date
2023-10-30
Publication Date
2026-06-02

AI Technical Summary

Technical Problem

Existing thermocatalytic CO2 hydrogenation to methanol synthesis technology suffers from low conversion rate, requires high pressure conditions, has complex processes, and is difficult to adapt to the volatility of new energy power, which limits its large-scale application.

Method used

A plasma catalytic method is used to pre-activate CO2 in a jet plasma reaction tower and then react it with H2 in a reverse water-gas shift reaction at atmospheric pressure. Combined with a multi-stage pressurization system and a purification system, the efficient conversion of CO/CO2/H2 mixed gas and methanol synthesis are achieved.

Benefits of technology

It improves the conversion rate and selectivity of CO2 to methanol, reduces energy consumption, adapts to the volatility of new energy power, and realizes the efficient chemical energy storage of green electricity and the synergistic conversion of greenhouse gases.

✦ Generated by Eureka AI based on patent content.

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Abstract

The application discloses a green electricity consumption system and method for synthesizing methanol by CO2 hydrogenation through plasma catalysis. H2 obtained by electrolysis of water and CO2 captured in an industrial process are first subjected to a reverse water gas shift reaction under efficient driving of normal pressure jet plasma to obtain a CO / CO2 / H2 mixed product, the mixed product is subjected to multi-stage pressurization after passing through a buffer storage tank, and green methanol is further synthesized in a hot catalytic bed. The application adopts a two-stage methanol synthesis system of plasma CO2 pre-conversion and CO / CO2 catalytic hydrogenation, solves the problems of catalyst deactivation and excessively high reaction temperature in a traditional hot catalytic reverse water gas shift reaction, and overcomes a thermodynamic bottleneck of a CO2 direct catalytic hydrogenation reaction. The plasma reaction device has high energy efficiency and is quick to start and stop, can be directly driven by fluctuating power, and the system maintains the stability of the catalytic system through intermediate product storage and multi-stage pressurization.
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