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Title: Partial oxidation of methane to syngas over Ni/MgO, Ni/CaO and Ni/CeO2
Authors: Tang, S. 
Lin, J. 
Tan, K.L. 
Keywords: Carbon deposition
Nickel catalyst
Partial oxidation of methane (POM)
Issue Date: 1998
Citation: Tang, S.,Lin, J.,Tan, K.L. (1998). Partial oxidation of methane to syngas over Ni/MgO, Ni/CaO and Ni/CeO2. Catalysis Letters 51 (3-4) : 169-175. ScholarBank@NUS Repository.
Abstract: Partial oxidation of methane to syngas at atmospheric pressure and 750 °C was examined over Ni/MgO, Ni/CaO and Ni/CeO2 catalysts with nickel loading of 13 wt%. All catalysts had similar high conversion of methane and high selectivity to syngas, which nearly approached the values predicted by thermodynamic equilibrium. However, only Ni/MgO showed high resistance to carbon deposition under thermodynamically severe conditions (CH4/O2 = 2.5, a higher CH4 to O2 ratio than the stoichiometric ratio). Its catalytic activity remained stable during 100 h of reaction, with no detectable carbon deposition. The oxidation of carbon deposited from pure CH4 decomposition and from pure CO disproportionate was investigated by in situ TPO-MS study which showed that both were effectively inhibited over Ni/MgO. In addition, the catalysts were characterized by TPR, XRD and XPS, It was revealed that the excellent performance of Ni/MgO resulted from the formation of an ideal solid solution between NiO and MgO.
Source Title: Catalysis Letters
ISSN: 1011372X
Appears in Collections:Staff Publications

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