稀土催化剂(Ce、La)用于丙烷催化燃烧的研究进展
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Advances in Rare Earth Element-based Catalysts Ce La for Propane Catalytic Combustion
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    目的 挥发性有机物(VOCs)对人体健康和生态环境都有不良影响,已引发研究者的广泛关注。 催化燃烧是 处理 VOCs 的有效技术之一,具有去除效率高、无二次污染等优势。 稀土元素 Ce、La 及其氧化物因特殊的理化性 质常作为催化助剂或载体,在催化燃烧中起着重要作用。 因此针对稀土催化剂(主要为 Ce、La),综述了其在丙烷 催化燃烧中的应用及相应的催化反应机制以及未来的发展方向。 方法 通过对 Ce 基和 La 基催化剂在丙烷催化燃 烧中的研究和应用进行综述,分析了稀土催化剂的反应机理及发展方向。 结果 首先,Ce、La 及其氧化物可调节催 化剂的整体结构、形貌和比表面积等物理性质;同时,上述物质也可与催化剂内的其他金属相互作用,从而有效调 控材料中的氧空位密度,最终增强对丙烷催化燃烧的反应活性。 其次,CeO2 作为载体能与活性金属产生有赖于 CeO2 形貌和晶面的金属-CeO2 相互作用,这会对催化剂的结构和性能产生极大影响。 此外,也讨论了通过优化合 成方法和表面改性所获得的 La 系钙钛矿催化剂在丙烷催化燃烧中的应用研究。 结论 目前,稀土基催化剂的催化 作用机制探索尚处于初级阶段,应对其进行更深入系统的研究,以早日实现其工业化应用。

    Abstract:

    Objective Volatile organic compounds VOCs have adverse effects on both human health and the ecological environment thus attracting widespread attention from researchers. Catalytic combustion is one of the effective technologies for treating VOCs with the advantages of high removal efficiency and no secondary pollution. Rare earth elements such as Ce and La and their oxides often play an important role in catalytic combustion due to their special physicochemical properties as catalytic additives or carriers. Therefore for rare earth catalysts mainly Ce and La their applications in the propane catalytic combustion and the corresponding catalytic reaction mechanisms as well as future development directions were reviewed. Methods Through a review of the research and applications of Ce-based and Labased catalysts in the propane catalytic combustion the reaction mechanisms and development directions of rare earth catalysts were analyzed. Results Firstly Ce La and their oxides modulated the physical properties of the catalyst such as the overall structure morphology and specific surface area. Meanwhile these substances also interacted with other metals within the catalyst to effectively modulate the oxygen vacancy density in the material ultimately enhancing the reactivity for the propane catalytic combustion. Secondly when CeO2 acted as a carrier it was capable of producing metal-CeO2 interactions with the active metal dependent on the CeO2 morphology and crystallographic surface which can have a great impact on the structure and performance of the catalyst. Studies on the application of La-based chalcogenide catalysts obtained by optimizing synthesis methods and surface modification in the propane catalytic combustion were also discussed. Conclusion At present the exploration of the catalytic mechanism of rare earth-based catalysts is still in its initial stage and in-depth and systematic research should be conducted to realize its industrial application as early as possible.

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龚旭栋,王玮璐,吴 云,张贤明.稀土催化剂(Ce、La)用于丙烷催化燃烧的研究进展[J].重庆工商大学学报(自然科学版),2024,(1):12-20
GONG Xudong, WANG Weilu, WU Yun, ZHANG Xianming. Advances in Rare Earth Element-based Catalysts Ce La for Propane Catalytic Combustion[J]. Journal of Chongqing Technology and Business University(Natural Science Edition),2024,(1):12-20

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  • 在线发布日期: 2024-01-15
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