In recent years

the layout of hydrogen production projects from renewable energy sources in China has been accelerating

and the consumption channels of hydrogen energy have become a key factor influencing the rapid development of hydrogen energy.Metal pipelines exposed to hydrogen have the possibility of hydrogen corrosion and hydrogen embrittlement

so the direct application of hydrogen energy poses a relatively high risk.Natural gas is a widely used clean energy source.The synthesis of green natural gas by coupling green hydrogen with carbon dioxide can not only reduce carbon dioxide in the atmosphere but also open up a way for the consumption of green hydrogen

making it a promising derivative of green hydrogen.This article expounds the pain points existing in the processes of electrolytic water hydrogen production

carbon capture and methanation

and analyzes the cost and market situation of green methane

providing alternative technical ideas for practitioners in this industry.