关键词: 能源, 生物质气, 固体氧化物燃料电池, 温室气体减排

Abstract: Biogas is readily available from various sources in large quantity. Large-scale utilization of biogas, which could effectively alleviate the energy shortage of China in the future, will be mainly dependent on the development of new technologies that could well be suitable to the characteristics of biogas, e.g. small scale, low net caloric value, frequent change of composition, etc. In the present paper, the status quo of biogas resources was investigated, and current status and future trends of biogas utilization were analyzed. Special focuses were put on analysis of technological and economic feasibility of biogas power generation via solid oxide fuel cells (SOFCs). It is demonstrated that SOFCs are highly adaptable to the characteristics of low net caloric value and frequent composition change of biogas. And, electrical generation through SOFCs is economically much superior as compared with conventional power generation techniques. Consequently, large-scale utilization of biogas via SOFCs will bring great economic, social and environmental benefits.

Key words: energy, biogas, solid oxide fuel cell, greenhouse gas emission reduction