Research progress of green ammonia synthesis from renewable energy and economic analysis of hydrogen-ammonia storage and transportation
With the rapid development of renewable energy and hydrogen energy industry,as a hydrogen storage medium,ammonia has received widespread attention due to its ability to perform long-term hydrogen storage and long-distance hydrogen transportation.Hydrogen production and ammonia synthesis process based on fossil fuels is mature,but the intensity of carbon dioxide emissions is high.Green ammonia utilizes renewable energy with electrolytic hydrogen production as hydrogen sources,which has the advantages of reducing carbon emissions in the synthetic ammonia industry,consuming renewable energy such as wind and solar energy,and serving as a hydrogen storage carrier for storage and transportation.Under the goals of carbon peak and carbon neutrality,the development of green ammonia synthesis process is of great significance.This paper reviews the research progress and challenges of industrial Haber-Bosch,electrochemical,photocatalysis,plasma and chemical chain synthesis of ammonia.The technical route and existing situation of water electrolysis powered by renewable energy for hydrogen production and ammonia synthesis process are elaborated.The technical and economic feasibility of grey ammonia synthesis from coal and green ammonia synthesis from renewable energy are compared.The impacts of electricity price and energy consumption of electrolytic hydrogen production on the cost of electrolytic hydrogen production for ammonia synthesis are analyzed.The cost structure of hydrogen storage with ammonia as a carrier and liquid hydrogen storage are discussed.The costs of hydrogen transportation with ammonia as a carrier and gas-hydrogen transportation are studied.The considerations for industrial development of green hydrogen for green ammonia synthesis and hydrogen storage and transportation with green ammonia as a carrier are proposed.
ammonia synthesisrenewable energyammonia storage and transportationgreen ammoniaeconomy
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