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论文类型：期刊论文

发表时间：2014-09-15

发表刊物：CATALYSIS TODAY

收录刊物：SCIE、EI、Scopus

卷号：233

页面范围：46-52

ISSN号：0920-5861

关键字：Methane; Carbon dioxide; Molybdenum carbide; Nickel

摘要：Ni-Mo2C(CP) and Ni-Mo2C(MM) catalysts were prepared through carbonization of NiMoOx precursors prepared by co-precipitation (CP) and mechanical mixing (MM), respectively. Different preparation methods lead to different chemical compositions, reduction properties, as well as carbonization process of NiMoOx precursors. It was found that Ni-Mo2C(CP) has better Ni dispersion than Ni-Mo2C(MM). With smaller Ni particles and higher CH4 dissociation rate, Ni-MO2C(CP) performs better than Ni-Mo2C(MM) in CH4/CO2 reforming. It is deduced that nickel is better stabilized in NiMoO4 than in NiO, and the sintering of metallic nickel during high-temperature carburization is less severe with NiMoO4(CP). Based on the results, we address for the first time the key roles of NiMoO4 as a precursor for the formation of Ni-Mo2C effective for CH4/CO2 reforming. (C) 2013 Elsevier B.V. All rights reserved.