Power Generation by Flat-Tube Solid Oxide Fuel Cells with Enhanced Internal Reforming of Methanol

Junkang Sang, Yuqing Li, Jun Yang, Tao Wu, Xiang Luo, Bo Chi, Wanbing Guan, Jingxiang Xu, Subhash C. Singhal

Research output: Journal PublicationArticlepeer-review

Abstract

Methanol is a promising fuel for solid oxide fuel cells (SOFCs) because of its low cost and ease of storage and transportation. In this work, the performance and long-term durability of direct methanol flat-tube SOFCs are investigated under different steam/carbon (S/C) ratios. It is confirmed that the S/C ratio exhibits little influence on cell performance but strongly affects long-term stability. The cell is discharged stably under high S/C ratios of 1.5 and 1.2, while it fails abruptly under a low S/C ratio of 1 due to severe carbon deposition. Extra nickel/yttria stabilized zirconia (Ni/YSZ) catalyst is added into the anode channels to serve as a prereformer. With improved internal reforming, the methanol conversion rate is promoted to 95% under S/C = 1, higher than that without extra catalyst and most results reported in the literature, and carbon deposition within the anode is significantly suppressed. Thus, no performance degradation is observed for 300 h of discharge under S/C = 1. On the basis of the experimental and simulating results, the mechanism of methanol conversion within the flat-tube cells is discussed.

Original languageEnglish
Pages (from-to)6276-6288
JournalACS Sustainable Chemistry and Engineering
Volume10
Issue number19
DOIs
Publication statusPublished - 16 May 2022

Keywords

  • Carbon deposition
  • Internal reforming
  • Long-term durability
  • Methanol
  • Solid oxide fuel cell

ASJC Scopus subject areas

  • Chemistry (all)
  • Environmental Chemistry
  • Chemical Engineering (all)
  • Renewable Energy, Sustainability and the Environment

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