【作者】 卫伟； 辛志峰； 钱婷婷； 张千峰；

【Author】 Wei Wei;Zhifeng Xin;Tingting Qian;Qianfeng Zhang;Institute of Molecular Engineering and Applied Chemistry, Anhui University of Technology;

【机构】 安徽工业大学,分子工程与应用化学研究所；

【摘要】 多硫钼化合物[Mo₃S（S₂）₆]^2-和[Mo₂（S₂）₆]^2-具有高活性的端基和桥基S₂^2-片段[1]。我们用浸渍法把这两两种化合物负载到介孔分子筛SBA-15上得到负载型催化剂Mo₃S（S₂）₆/SBA-15和Mo₂（S₂）₆/SBA-15,并研究它们对噻吩的加氢催化性能。簇合物中的S-S片段在氢气作用下生成高活性的加氢基团-SH,氢原子从-SH集团上转移到噻吩的碳原子上生成四氢噻吩,完成加氢步骤。簇合物上的S在氢气作用下以H₂S的形式脱去产生空位,与此同时四氢噻吩上的硫进攻此空位并与Mo结合完成脱硫的步骤[2].更多还原

【Abstract】 Thiomolybdates[Mo₃S（S₂）₆]^2- or[Mo₂（S₂）₆]^2- with different structures and similar terminal/bridging sulfurs(S₂^2-)[1]have been anchored on SBA-15 by an immersion method.Catalytic activity and desulfurization selectivity of Mo₃S（S₂）₆/SBA-15 and Mo₂（S₂）₆/SBA-15 were studied in the reaction of thiophene hydrodesulfurization（HDS） at different temperatures.Direct hydrogenation（HYD）of thiophene occurs presumably with the participation of-SH groups,produced from the opening of S-S bridges by hydrogen.And the desulfurization of thiophene occurs presumably with the transform of-S group from thiophene or tetrahydro-thiophene to the vacancies on the thiomolybdates produced by the loss of-S in the hydrogenation process[2].更多还原