【作者】 苏海兰；

【导师】 王日杰；

【作者基本信息】 天津大学 ， 工业催化， 2007， 硕士

【摘要】 以γ-Al2O3为载体、以钼酸铵和硝酸钴为浸渍组分,采用等体积浸渍法制备了一系列Co-Mo/γ-Al2O3催化剂,采用XRD、XPS和NH3-TPD等技术对制备的催化剂进行了表征。采用固定床反应器考察了反应温度、反应压力、原料的进料组成和乙烯的气时空速等反应条件对乙烯和硫化氢合成乙硫醇反应的影响,初步确定了适宜的催化剂评价条件为:反应温度240°C,反应压力1.4MPa,H2S/C2H4(摩尔比)为3:1,乙烯的气时空速300h-1。在选定的评价条件下,评价了Co-Mo/γ-Al2O3催化剂对乙烯和硫化氢合成乙硫醇反应的催化性能,考察了催化剂的组成和制备条件对催化剂性能的影响。结果表明,MoO3和CoO的适宜负载量均为10wt%,在500°C下焙烧的催化剂活性较好。采用正交实验,对反应温度、反应压力、原料的进料组成和乙烯的气时空速等反应条件做了进一步研究,结果表明,适宜的反应条件为:反应温度265°C,反应压力1.6MPa,H2S/C2H4(摩尔比)为2:1,乙烯的气时空速为240h-1。更多还原

【Abstract】 Usingγ-alumina as support, ammonium molybdate and cobalt nitrate as impregnated precursor components, a series of Co-Mo/γ-Al2O3 samples were prepared by incipient-wetness impregnation method, and their physico-chemical performances were characterized by XRD, XPS and NH3-TPD techniques.The fixed bed reactor was used to test the effect of reaction temperature, reaction pressure, gas hourly space velocity of ethylene and molar ratio of reactants on the catalytic activity for the addition of hydrogen sulfide to ethylene. The reaction condition of temperature of 240°C, pressure of 1.4MPa, GHSV of ethylene of 300h-1 and molar ratio of hydrogen sulfide to ethylene of 3:1 was estimated as the proper evaluation condition.The activity of Co-Mo/γ-Al2O3 catalyst for ethyl mercaptan synthesis from hydrogen sulfide and ethylene was evaluated, and the influence of the composition and the preparation condition of the catalysts on the catalyst performences were investigated under above evaluation conditions. The result showed that the catalyst calcined at 500°C was better, the optimal content of MoO3 and CoO loading on the catalyst were both 10wt%.Orthogonal experiment was designed to optimize the reaction condition and the result showed that the optimal reaction conditions were temperature of 265°C, pressure of 1.6MPa, GHSV of ethylene of 240h-1 and molar ratio of hydrogen sulfide to ethylene of 2:1.更多还原