Effect of cobalt addition on the structure and properties of Ni–MCM-41 for the partial oxidation of methane to syngas |
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| Authors: | Yufeng Li Junwen Wang Chuanmin Ding Lichao Ma Yanan Xue Jing Guo Shunqiang Wang Yuanyuan Meng Kan Zhang Ping Liu |
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| Institution: | College of Chemistry & Chemical Engineering, Taiyuan University of Technology, Taiyuan 030024 PR China, Fax: +86 351 6014 498, +86 351 6014 498 ; Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan 030001 PR China |
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| Abstract: | A one-step hydrothermal crystallization method was used to synthesize Co–Ni–MCM-41 catalysts for the partial oxidation of methane to syngas reaction. Co was added as an assistant in the synthesis process. The formation of a Ni–Co alloy decreased the damage of Ni ions to the framework of MCM-41. The Ni–Co alloy introduced more Ni into the channel exposing more active sites. The properties of the synthesized catalysts were characterized by XRD, N2 adsorption–desorption, TEM, ICP, FT-IR, H2-TPR, XPS and TGA techniques. Co–Ni–MCM-41 catalysts showed superior catalytic performance and sintering resistance than Ni–MCM-41 catalyst without Co. The Ni–Co alloy inhibited the formation of the NiO, thus reducing the sintering of the catalyst. The result was attributed to higher metal dispersion and more regular pore structure of the Co–Ni–MCM-41 catalysts. When the Co content was 1%, a conversion of 88% and selectivity of 87% was achieved.The Ni–Co alloy confined within MCM-41 improved dispersibility and the stability of Ni. |
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