Journal
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
Volume 10, Issue 19, Pages 6276-6288Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acssuschemeng.2c00518
Keywords
Solid oxide fuel cell; Internal reforming; Methanol; Long-term durability; Carbon deposition
Categories
Funding
- National Key R&D Program of China [2017YFE0129300]
- National Natural Science Foundation of China [U20A20251, 11932005]
- Key R & D projects in Zhejiang Province [2021C01101]
- Ningbo major special projects of the Plan ?
- Science and Technology Innovation [2025 (2019B10043)]
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In this study, the performance and long-term durability of direct methanol flat-tube fuel cells were investigated under different steam/carbon ratios. It was found that the ratio had little influence on the cell performance but strongly affected the long-term stability. The addition of a catalyst promoted the methanol conversion rate and suppressed carbon deposition within the anode.
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 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.
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