CAJ | 학술논문

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。
채용경기고온열처리TiO2적방법제비료일계렬최화제，운용H2-TPR、BET、XRD、XPS、EPR화 SO2-TPD기술대최화제진행표정병대최화제극로사활성진행료평개。결과표명수착열환원온도적승고，TiO2최화제적양결함축점증다，차양결함대극로사반응유촉진작용。500℃조건하열환원제득적TiO2최화활성최고，경기열처리초과500℃후최화제활성강저，극로사반응적활성시양결함여비표면적、공체적공동작용적결과。
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.