YAO Yao, CAI Peijun, WANG Shaorong

(School of Chemical Engineering and Technology, China University of Mining and Technology, Xuzhou 221116, Jiangsu, China)

Abstract:  Solid oxide fuel cells (SOFCs) have been attracting remarkable attention as one of the most promising green energy conversion devices in the recent years, which can efficiently convert the chemical energy, in hydrocarbons fuels, such as natural gas, biogas, and gasified coal, directly to electricity. Dry reforming of methane (DRM) converts two kinds of greenhouse gases (methane and carbon dioxide) into two active species (hydrogen and carbon monoxide). At the same time, it is of great significance to improve the utilization of methane, reducing pollution and promoting new routes for chemical industry. However, commonly used Ni-based anodes suffer from carbon coking, which is a major challenge to the commercialization of SOFCs. Therefore, the key point of this technology is to optimize the anti-carbon deposition performance of nickel-based anode and prepare stable, efficient and anti-carbon deposition catalyst. In this paper, the dry reforming technology of biogas and the mechanism of anti-carbon deposition were briefly described, while the methods of anti-carbon deposition reported in the open literature were summarized. According to the research status of SOFC anti-carbon deposition catalyst, external reforming methods were summarized from the view point of solving the problems related to anti-carbon deposition.

Key words:  SOFC; biogas; methane dry reforming; anti carbon deposition; catalyst