沼气制氢工艺研究进展

Biogas is a clean and renewable energy with great potential and can be used as a source of bio-methane. Hydrogen production from methane obtained from biogas purification or direct hydrogen production from biogas has the advantages of being sustainable and environmentally friendly. The removal of impurities in biogas, and the optimization of catalysts and operating conditions are the key factors affecting the efficiency and selectivity of hydrogen production from biogas. This paper introduces several biogas reforming technologies for hydrogen production. Methane purified from biogas can be converted into hydrogen by catalytic cracking, which can avoid the formation of CO_x. Dry reforming which consumes the main components of biogas to produce hydrogen and chemical looping reforming which combines the separation and purification of hydrogen, CO₂ capture and thermal integration are more suitable for hydrogen production from biogas. Hydrogen production from biogas by efficient reforming technologies is of great significance in promoting the industrialization of bio-methane, enhancing the utilization of renewable energy and achieving reduced carbon emissions.