Highly efficient utilization of industrial barium slag for carbon gasification in direct carbon solid oxide fuel cells
| Autor: | Fangyong Yu, Zhongyuan Sun, Zhang Jinjin, Yujiao Xie, Tingting Han, Ziheng Xie, Naitao Yang, Haibin Sun, Jie Xiao, Wang Yishang |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
Materials science
Renewable Energy Sustainability and the Environment Oxide Energy Engineering and Power Technology chemistry.chemical_element Slag Barium Condensed Matter Physics Catalysis chemistry.chemical_compound Boudouard reaction Fuel Technology chemistry Chemical engineering visual_art visual_art.visual_art_medium Energy transformation Carbon Efficient energy use |
| Zdroj: | International Journal of Hydrogen Energy. 46:37029-37038 |
| ISSN: | 0360-3199 |
| Popis: | Direct carbon solid oxide fuel cells (DC-SOFCs) are recognized as an efficient energy conversion device. With regard to their operation mechanism, the reverse Boudouard reaction rate is the crucial factor influencing cell performance. In this work, a new-type catalyst derived from industrial barium slag (BS) was first developed to enhance the reverse Boudouard reaction and DC-SOFC performance. The chemical composition and micro-morphologies of BS and barium slag-derived catalyst (BSC) were characterized in detail. The superiorities of BS and BSC were reflected in the enhanced DC-SOFC performance and high fuel utilization. The single cell fueled by BSC-loaded carbon yielded the best output of 249 mW cm−2 at 850 °C. This result was comparable to the 266 mW cm−2 output of a hydrogen-fueled SOFC due to the superior catalytic activity of metallic catalysts toward carbon gasification. The advantage of the BSC was also observed in the durable operation of the corresponding DC-SOFCs, which lasted for 36.2 h at 50 mA with the fuel utilization of 29.0%. This work provides a new channel for green and efficient utilization of BS and other industrial residues, and a novel option to the development of energy conversion technology. |
| Databáze: | OpenAIRE |
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