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首页> 外文期刊>RSC Advances >An efficient robust fluorite CeZrO4-delta oxide catalyst for the eco-benign synthesis of styrene
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An efficient robust fluorite CeZrO4-delta oxide catalyst for the eco-benign synthesis of styrene

机译：一种高效，坚固的萤石CeZrO4-δ氧化物催化剂，用于苯乙烯的生态良性合成

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In this work, we have reported CeO2, ZrO2, physically mixed (PH)-CeO2/ZrO2 and fluorite CeZrO4-delta oxides and their catalytic activities for the oxidative dehydrogenation (ODH) of ethyl benzene (EB) to styrene (ST) using molecular oxygen, air and carbon dioxide as oxidants. The catalysts were prepared by a gel-combustion method followed by calcination at 600 degrees C for 6 h and subjected to catalytic activity measurements. All the catalysts were characterized and studied by various physicochemical methods. The reaction parameters were varied systematically such as different catalysts, oxidants, temperatures, EB flow and oxidant flow. CeZrO4-delta accounted for a 47% styrene yield for 72 h without any significant deactivation under optimized reaction conditions. A thorough analysis of the spent catalysts demonstrated the robustness of the catalyst for this reaction under different oxidants and reaction conditions. Pristine CeO2 deactivated easily and the activity decreased with time on stream of the reaction.
机译：在这项工作中，我们已经报道了CeO2，ZrO2，物理混合（PH）-CeO2 / ZrO2和萤石CeZrO4-δ氧化物及其使用分子对乙苯（EB）氧化苯乙烯（ST）氧化脱氢（ODH）的催化活性。氧气，空气和二氧化碳作为氧化剂。通过凝胶燃烧法制备催化剂，然后在600℃下煅烧6小时并进行催化活性测量。通过各种物理化学方法对所有催化剂进行了表征和研究。反应参数系统地变化，例如不同的催化剂，氧化剂，温度，EB流量和氧化剂流量。在优化的反应条件下，CeZrO4-δ占72％苯乙烯收率的72小时，没有任何明显的失活。对废催化剂的透彻分析表明，该催化剂在不同氧化剂和反应条件下对于该反应的稳健性。原始的CeO2容易失活，并且随着反应的进行，其活性随时间降低。

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