Application of biochar derived from used cigarette filters in direct carbon solid oxide fuel cell

作者：Tong, Xin; Hou, Junwei; Li, Yuzhi; Li, Hualing; Wu, Weichuang; Guo, Yanning; Liu, Yiying; Fu, Daishuang; Huang, Xingkai; Xiong, Zhe; Jiang, Jun; Qi, Long; Wang, Hailin^*; Cai, Weizi^*

来源：International Journal of Hydrogen Energy, 2022, 47(54): 22972-22980.

DOI：10.1016/j.ijhydene.2022.05.102

• Direct carbon fuel cells
• Solid oxide fuel cell
• Carbon fuel
• Boudouard reaction
• Fe catalyst

As a typical waste, used cigarette filters (UCFs) are difficult to biodegrade and harmful to the environment. The direct carbon solid oxide fuel cell (DC-SOFC) is an energy conversion device that can utilize carbon directly, including biochar, as fuel. We report a superior DCSOFC powered by Fe-loaded UCF biochar in this paper. The microstructure and composition are characterized, indicating that the UCF biochar is micron-sized and contains metal elements such as K and Ca that are beneficial to the performance of DC-SOFC. The peak power density of the cell fueled by pure UCF biochar is 308 mW cm-2 and increases to 341 mW cm-2 after loading Fe as the catalyst, which is comparable to that of the cell with Fe-loaded activated carbon (368 mW cm-2). It proves the feasibility of the UCF biochar as fuel for DC-SOFCs, providing a theoretical basis and technical demonstration for the disposal and transformation of solid waste.

• 单位
  华南农业大学