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首页> 外文期刊>Catalysis science & technology >Activity studies of vanadium, iron, carbon and mixed oxides based catalysts for the oxidative dehydrogenation of ethylbenzene to styrene: a review
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Activity studies of vanadium, iron, carbon and mixed oxides based catalysts for the oxidative dehydrogenation of ethylbenzene to styrene: a review

机译：钒，铁，碳和混合氧化物催化剂的活性研究，用于将乙烯乙烯氧化脱氢作用：综述

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摘要

Despite the enormous amount of research dedicated to the dehydrogenation of ethylbenzene to styrene over the last seven decades, there is still a great need to invent more efficient and cost-effective catalysts for the reaction process. It was found that an appropriate oxidation state of the active metal in a catalyst plays a vital role. For vanadium(V) based catalysts, the active phase of V was observed to be V5+ species for enhanced activity. In the iron-based catalyst systems, considerably better activities were found with the catalysts that involved the continuous oxidation of Fe2+ to Fe3+. On the other hand, the mixed oxide catalysts showed better performance than those of the individual oxides perhaps due to the increased acid-base bi-functionality. Various carbon-based catalysts, such as carbonaceous adsorbents, CNTs, carbon nanofoams, carbon fibers, and nanodiamond, have found to be active for the oxidative dehydrogenation of ethylbenzene. The prime cause for the deactivation of all these catalysts was coke formation on the surface of the catalyst, which needs to be minimized for better catalytic activity. In this review, various vanadium, iron, carbon and mixed-oxide based catalysts, which have been reported in the literature, are briefly surveyed for their activity towards the dehydrogenation of ethylbenzene to yield styrene.
机译：尽管在过去的七十年中，大量研究旨在将乙烯苯脱氢作用为苯乙烯，但仍然需要发明对反应过程的更有效且具有成本效益的催化剂。发现催化剂中活性金属的适当氧化状态起着至关重要的作用。对于基于钒（V）的催化剂，观察到V的活性相为V5+物种，以增强活性。在基于铁的催化剂系统中，发现催化剂的活性相当好，催化剂涉及Fe2+连续氧化至Fe3+。另一方面，混合的氧化催化剂表现出的性能比单个氧化物的性能更好，这可能是由于酸碱双功能的增加。各种基于碳的催化剂，例如碳胶吸附剂，CNT，碳纳米氧化碳，碳纤维和纳米原子，已经发现活性用于乙烯乙烯的氧化脱氢作用。所有这些催化剂失活的主要原因是催化剂表面上的可乐形成，需要将其最小化以更好地催化活性。在这篇综述中，对文献中已经报道的各种钒，铁，碳和基于氧化物的催化剂进行了简要调查，以便其对乙烯苯脱氢作用的活性以产生苯乙烯。

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