关键词: 二氧化碳, 甲烷化, 电转气, 碳捕捉, 储能, 氢原料, 电解水,

Abstract:

CCUS(carbon capture, utilization and storage) has been one of the primary measures worldwide to reduce carbon dioxide emissions, achieving sustainable development. However, the captured carbon dioxide(CO₂) at present is lacking commercial value, making the popularization of CCUS face many challenges. Power-to-gas technology utilizes CO₂ methanation reaction, using H₂ produced by captured CO₂ and green hydrogen technology to produce CH₄, which can reduce CO₂ emissions. It has the characteristics of low large-scale storage and transportation cost and long energy storage cycle. Compared with other CO₂ utilization technologies, it has obvious advantages and is expected to become an important technology for solving carbon emissions and renewable energy curtailment in China. At present, China lacks sufficient attention to methanation reaction and lacks relevant research and demonstration projects. The article analyzes the current research status and progress of methanation reaction internationally, including reaction thermodynamics, catalyst research, and demonstration projects of power-to-gas, in order to inspire the application of power-to-gas technology in China.

Key words: carbon dioxide, methanation, power-to-gas, CCUS, energy storage, hydrogen feedstock, electrolytic water