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dc.contributor.author方智敏
dc.contributor.author翁维正
dc.contributor.author万惠霖
dc.contributor.author蔡启瑞
dc.date.accessioned2012-03-24T10:48:27Z
dc.date.available2012-03-24T10:48:27Z
dc.date.issued1998-04
dc.identifier.citation天然气化工(C1化学与化工),1998,23(2):25-29zh_CN
dc.identifier.issn1001-9219
dc.identifier.urihttps://dspace.xmu.edu.cn/handle/2288/11866
dc.description通讯联系人:万惠霖zh_CN
dc.description.abstract[中文摘要]应用IR和低温EPR等方法研究了载体酸碱性对钒基催化剂丙烷氧化脱氢性能的影响。从VSnO、VSiO、VTiO、VAlO到VMgO,随着载体的碱性增强,丙烷转化率和丙烯选择性均提高,然而从VMgO、VCaO、VS-rO到VBaO,随着载体碱性的进一步增强,丙烯选择性仍提高,但丙烷转化率显著降低。这些结果表明,只有适度增强催化剂的碱性,才有利于生成V4+离子,减少表面碳酸盐的生成,并缩短脱氢中间体在催化剂上的停留时间和促进丙烯的脱附,减少C-C键断裂和转化为COx的机会,从而有利于丙烷氧化脱氢生成丙烯。[英文摘要]The effects of acidity and basicity of the supports on the performance of Vbased catalysts for oxidative dehydrogenation of propane were investigated by IR and EPR. Propane conversion and propene selectivity increased with an increase of basicity of the supports in the order:VSnO→VSiO→VTiO→VAlO→VMgO.However, with a further increase of basicity in the order:VMgO→VCaO→VSrO→VBaO, propane conversion decreased remarkably although propene selectivity remained increasing.These results indicated that only moderate strengthening basicity can be beneficial to form v4+ ions,reduce surface carbonate formation,shorten the reteution time of dehydrogenated intermediate on the catalyst,promote desorption of propene hence favourable for propane dehydrogenation to propene.zh_CN
dc.description.sponsorship国家自然科学基金,国家教委博士点基金zh_CN
dc.language.isozhzh_CN
dc.publisher《天然气化工(C1化学与化工)》编辑部zh_CN
dc.subject丙烷氧化脱氢zh_CN
dc.subject钒基催化剂zh_CN
dc.subject载体酸碱性zh_CN
dc.subjectIRzh_CN
dc.subjectEPRzh_CN
dc.subjectoxidative propane dehydrogenationzh_CN
dc.subjectVbased catalystzh_CN
dc.subjectacidity and basicity of supportszh_CN
dc.title载体酸碱性对钒基催化剂丙烷氧化脱氢性能的影响及其IR和EPR研究zh_CN
dc.title.alternativeEffects of acidity and basicity of supports on the performance of V based catalysts for oxidative dehydrogenation of propane and their IR and EPR studieszh_CN
dc.typeArticlezh_CN


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