NiMo-calcium-doped ceria catalysts for inert-substrate-supported tubular solid oxide fuel cells running on isooctane
| Autor: | Shuozhen Hu, Su Ha, Qing Xu, Kai Zhao, Min Chen, M. Grant Norton, Cheng Gang, Dongchu Chen, Bok-Hee Kim |
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| Rok vydání: | 2020 |
| Předmět: |
Inert
Materials science Renewable Energy Sustainability and the Environment Oxide Energy Engineering and Power Technology Substrate (chemistry) 02 engineering and technology Conductivity 010402 general chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics Electrochemistry 01 natural sciences 0104 chemical sciences Catalysis chemistry.chemical_compound Fuel Technology Chemical engineering chemistry visual_art visual_art.visual_art_medium Ceramic Partial oxidation 0210 nano-technology |
| Zdroj: | International Journal of Hydrogen Energy. 45:29367-29378 |
| ISSN: | 0360-3199 |
| DOI: | 10.1016/j.ijhydene.2020.07.204 |
| Popis: | A calcium-doped ceria (Ce1-xCaxO2−δ, 0 ≤ x ≤ 0.3) has been applied as a ceramic support in NiMo-based catalysts for an internal reforming tubular solid oxide fuel cell running on isooctane. Introducing calcium into the CeO2-based ceramic was found to improve conductivity of Ce1-xCaxO2−δ. The Ce0.9Ca0.1O2−δ (x = 0.10) sample exhibited an optimum conductivity of 0.045 S cm−1 at 750 °C. The transport of oxygen ions in Ce1-xCaxO2−δ promoted the catalytic partial oxidation of isooctane in the NiMo–Ce1-xCaxO2−δ catalyst, which increased the fuel conversion as well as H2 and CO yields. As a result, the NiMo–Ce0.9Ca0.1O2−δ (x = 0.10) catalyst exhibited a high isooctane conversion of 98%, and the H2 and CO yields achieved 74% and 83%, respectively, for reforming of isooctane and air at the O/C ratio of 1.0 at 750 °C. Furthermore, the NiMo–Ce0.9Ca0.1O2−δ catalyst has been applied as an internal reforming layer for an inert-substrate-supported tubular solid oxide fuel cell running on isooctane/air. Due to its high reforming activity, the single cell presented an initial maximum power density of 355 mW cm−2 in isooctane/air at 750 °C and displayed stable electrochemical performance during ~30 h operation. These results demonstrated the application feasibility of the NiMo–Ce0.9Ca0.1O2−δ catalyst for direct internal reforming solid oxide fuel cells running on isooctane/air. |
| Databáze: | OpenAIRE |
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