Preparation of RuCeTi catalyst and catalytic oxidation of chlorobenzene
WANG Meng-xue, CHEN Xi, JIA Zi-liang, Li Shu-ning, LIANG Mei-sheng
Shanxi Key Laboratory of Compound Air Pollutions Identification and Control, College of Environmental Science and Engineering, Taiyuan University of Technology, Jinzhong 030600, China
摘要 In this paper, a catalyst support (CeTi) with abundant strong acidic sites was prepared by sol-gel method, and Ru was loaded on to form a RuCeTi catalyst by chemical reduction process using a certain reductant. And that was used for the catalytic oxidation of chlorobenzene (CB). With the help of characterizations like XRD, HRTEM, XPS, H2-TPR, and in-situ DRIFTS, it showed that the interaction between Ru and CeO2 increased the valence state of Ru species, leading to the promotion of redox ability of RuO2 and the deep oxidation of chlorobenzene. Further the abundant strong acidic sites of the CeTi support provided the adsorption sites for CB. The activity tests showed that the CO2 selectivity and durability of RuCeTi were significantly enhanced, with a 98% of selectivity and 24h on-stream test at 1000×10-6 of CB concentration without deactivation. And that could be derived from the synergistic combination of reactive oxygen species and acidic sites.
Abstract：In this paper, a catalyst support (CeTi) with abundant strong acidic sites was prepared by sol-gel method, and Ru was loaded on to form a RuCeTi catalyst by chemical reduction process using a certain reductant. And that was used for the catalytic oxidation of chlorobenzene (CB). With the help of characterizations like XRD, HRTEM, XPS, H2-TPR, and in-situ DRIFTS, it showed that the interaction between Ru and CeO2 increased the valence state of Ru species, leading to the promotion of redox ability of RuO2 and the deep oxidation of chlorobenzene. Further the abundant strong acidic sites of the CeTi support provided the adsorption sites for CB. The activity tests showed that the CO2 selectivity and durability of RuCeTi were significantly enhanced, with a 98% of selectivity and 24h on-stream test at 1000×10-6 of CB concentration without deactivation. And that could be derived from the synergistic combination of reactive oxygen species and acidic sites.
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