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Preparation of alkali-resistant, Sil-1 encapsulated nickel catalysts for direct internal reforming-molten carbonate fuel cell |
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| Authors: | Jinglin Zhou Xiongfu Zhang Jian Zhang Haiou Liu Li Zhou KingLun Yeung |
| Affiliation: | aState Key Laboratory of Fine Chemicals, School of Chemical Engineering and Technology, Dalian University of Technology, Dalian 116012, PR China;bFuel Cell Research and Development Center, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, PR China;cDepartment of Chemical and Biomolecular Engineering, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong, SAR, PR China |
| Abstract: | A thin layer of silicalite-1 zeolite membrane was grown on the surface of Ni/SiO2 and Ni/Al2O3 catalyst beads after seeding and secondary regrowth to create core–shell catalysts that are resistant to alkali poisoning from direct internal reforming-molten carbonate fuel cell (DIR-MCFC). The zeolite shell thickness was optimized to prevent poisoning and minimize diffusion resistance. An out-of-cell test was designed to simulate the fuel cell operating conditions, which showed that the new core–shell catalysts maintained a high activity similar to the original fresh catalyst in spite of the exposure to alkali vapor at high temperature. The conventional Ni/SiO2 and Ni/Al2O3 catalysts suffered higher than 80% decrease in activity for steam reforming of methane reaction (SRM). |
| Keywords: | Core– shell catalyst Nickel catalyst Fuel cell Methane steam reforming Catalyst deactivation Zeolite membrane |
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