氢气热处理对TiO2催化剂克劳斯活性的影响  

Eeffect of hydrogen thermal treatment of TiO_2 on its catalytic activity in Claus reaction

作　　者：马国强[1,2] 侯亚芹[1] 韩小金[1] 黄张根[1] 王斌[3] 

机构地区：[1]中国科学院山西煤炭化学研究所煤转化国家重点实验室,山西太原030001 [2]中国科学院大学,北京100049 [3]江苏河海科技工程集团有限公司,江苏泰兴225400

出　　处：《天然气化工—C1化学与化工》2014年第1期1-5,共5页Natural Gas Chemical Industry

基　　金：国家自然科学基金项目(21177136,21103218);山西省国际合作项目(2012081019)

摘　　要：采用氢气高温热处理TiO2的方法制备了一系列催化剂,运用H2-TPR、BET、XRD、XPS、EPR和SO2-TPD技术对催化剂进行表征并对催化剂克劳斯活性进行了评价。结果表明随着热还原温度的升高,TiO2催化剂的氧缺陷逐渐增多,且氧缺陷对克劳斯反应有促进作用。500℃条件下热还原制得的TiO2催化活性最高,氢气热处理超过500℃后催化剂活性降低,克劳斯反应的活性是氧缺陷与比表面积、孔体积共同作用的结果。The TiO2 catalyst for Claus reaction was treated with hydrogen at different temperatures, and the treated and untreated catalysts were characterized by H2-TPR, BET, XRD, XPS, EPR and SO2-TPD, and their catalytic activities in the Claus reaction were evaluated. The results showed that with the raising of hydrogen reduction temperature, the oxygen defects of the TiO2 gradually increased. The oxygen defects could enhance the Claus activity of the catalyst, and the catalyst treated at 500℃ exhibited the highest Claus activity. The activity reduction of the catalyst treated at higher than 500℃ was attribute to the reduction of the specific surface area and pore volume of the catalyst.

关 键 词：二氧化钛 催化剂 氢气处理 克劳斯反应 硫化氢 二氧化硫 

分 类 号：TQ426[化学工程] O643[理学—物理化学]