Abstract In this study, Ce-modified SCR catalysts under different Ce loading amounts and different calcination temperatures were prepared by sol-gel method, aiming for simultaneous removal of nitrogen oxide (NOX) and typical volatile organic compounds (VOCS) (i.e. benzene and toluene) during coal-fired power generation process. Characterization techniques including Nitrogen adsorption and desorption, SEM-EDS, XRD, XPS and NH3-TPD were applied to reveal the influences of Ce loading amounts and calcination temperatures on surface properties, adsorption abilities, physical structures, valence state and acid sites of catalysts, which interpreted the result of removal efficiency a step further. Among catalysts of Ceα-V-W/Ti-β (α = 0, 0.025, 0.05 and 0.1 in molar ratio; β = calcination temperature of 400, 500 and 600 °C), Ce0.05-V-W/Ti-500 presented optimal physicochemical properties which had more pore structure, larger specific surface area, higher components dispersion and better redox ability. Ce0.05-V-W/Ti-500 could reach 92.5% NO removal efficiency, 97.3% benzene and 99.4% toluene removal efficiency when at 380 °C reaction temperature.

中文翻译：

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Ce改性VW-Ti型催化剂同时控制NO和典型VOCS的性能

摘要 本研究采用溶胶-凝胶法制备了不同 Ce 负载量和不同煅烧温度下的 Ce 改性 SCR 催化剂，旨在同时去除氮氧化物 (NOX) 和典型的挥发性有机化合物 (VOCS)（即苯和甲苯）。 ) 在燃煤发电过程中。应用氮吸附和解吸、SEM-EDS、XRD、XPS和NH3-TPD等表征技术揭示了Ce负载量和煅烧温度对催化剂表面性质、吸附能力、物理结构、价态和酸位的影响，这进一步解释了去除效率的结果。在 Ceα-VW/Ti-β（α = 0、0.025、0.05 和 0.1 的摩尔比；β = 400、500 和 600 °C 的煅烧温度）催化剂中，Ce0. 05-VW/Ti-500具有最佳的理化性能，具有更多的孔结构、更大的比表面积、更高的组分分散性和更好的氧化还原能力。Ce0.05-VW/Ti-500在380℃反应温度下可达到92.5%的NO去除效率、97.3%的苯和99.4%的甲苯去除率。