Carbon dioxide reforming of methane over Ni/Mo/SBA-15-La2O3 catalyst: Its characterization and catalytic performance |
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| Authors: | Jian Huang Renxiong Ma Tao Huang Anrong Zhang Wei Huang |
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| Institution: | aKey Laboratory of Coal Science and Technology of Ministry of Education and Shanxi Province, Taiyuan University of Technology Taiyuan 030024, Shanxi, China;bInstitute of Engineering Thermophysics & Chinese Academy of Sciences, Beijing 100190, China;cDepartment of Applied Chemistry, Yuncheng University, Yuncheng 044000, Shanxi, China |
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| Abstract: | The Ni/Mo/SBA-15 catalyst was modified by La2O3 in order to improve its thermal stability and carbon deposition resistance during the CO2 reforming of methane to syngas. The catalytic performance, thermal stability, structure, dispersion of nickel and carbon deposition of the modified and unmodified catalysts were comparatively investigated by many characterization techniques such as N2 adsorption, H2-TPR, CO2-TPD, XRD, FT-IR and SEM. It was found that the major role of La2O3 additive was to improve the pore structure and inhibit carbon deposition on the catalyst surface. The La2O3 modified Ni/Mo/SBA-15 catalyst possessed a mesoporous structure and high surface area. The high surface area of the La2O3 modified catalysts resulted in strong interaction between Ni and Mo-La, which improved the dispersion of Ni, and retarded the sintering of Ni during the CO2 reforming process. The reaction evaluation results also showed that the La2O3 modified Ni/Mo/SBA-15 catalysts exhibited high stability. |
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| Keywords: | CO2-reforming SBA-15 molecular sieve carbon deposition La-promoted |
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