关键词: 二氧化碳减排, 电化学合成氨, 尿素, 氢能

Abstract:

Along with the energy revolution and the advent of the hydrogen produced by electric power, the raw materials and technology for ammonia synthesis are constantly changing. In the context of the revolution of the hydrogen energy industry, the ammonia synthesis industry using hydrogen from water electrolysis in China is not easily constrained by capacity, quota, feedstock and resources, resulting in constructing the largest industrial chain of water electrolysis production and utilization of hydrogen in China. Ammonia synthesis will also transition from traditional hydrogen production from fossil feedstocks to ammonia synthesis from water electrolysis. In addition to being used for the production of fertilizer, ammonia synthesized from green power water electrolysis is expected to replace heavy oil for ship fuel, and to be used for energy storage and peak regulation in coal power plants to replace coal collaborated with the reducing carbon for the production of urea. The application scenario for ammonia synthesis will also shift from traditional synthetic ammonia urea plants from fossil feedstocks to hydrogen production from photovoltaic or wind power plants to produce ammonia, and the capture of carbon dioxide from coal power plant flue gas could produce ammonia to generate renewable urea. Hydrogen production from water electrolysis in oil and gas fields to produce ammonia can realize coupled co-production of electricity-hydrogen-ammonia above ground and oil and gas underground. Along with the changes and progress of hydrogen production from photovoltaic or wind power and ammonia synthesis technology, new challenges will be emerged, such as ammonia transportation, oxygen consumption by water electrolysis and steam consumption by ammonia synthesis.

Key words: CO₂ reduction, electrochemical ammonia synthesis, urea, hydrogen energy