Mechanistic studies of the selective reduction of NOx over Cu/ZSM-5 and related systems
Mechanistic studies of the selective reduction of NOx over Cu/ZSM-5 and related systems
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DOI：
10.1016/0920-5861(95)00133-z
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发表时间：
1995-11
期刊：
影响因子：
5.3
通讯作者：
A. P. Walker
中科院分区：
文献类型：
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作者：
A. P. Walker
在大量过量氧气的存在下通过烃选择性催化还原NO是当今催化化学家面临的最大挑战之一。据报道，第一个显示出对该反应的实质性承诺的催化剂是离子交换的Cu/ZSM-5，并且这已经成为“基准”贫NOx催化剂。已经对这种催化剂系统进行了大量的研究，并且在这种材料上的反应的特征特性相当好地被定义。这些特征被收集在一起，并在这篇综述文章中进行分析。此外，许多研究人员试图确定在这种催化剂上的反应机理。这些研究进行了详细的讨论，并对每一个机械的建议，支持和反对的证据进行评估。本文还综述了对相关催化剂体系进行的机理研究，并就Cu/ZSM-5上进行的工作进行了讨论。
The selective catalytic reduction of NO by hydrocarbons in the presence of a large excess of oxygen is one of the greatest challenges facing catalytic chemists today. The first catalyst reported to show substantial promise for this reaction was ion-exchanged Cu/ZSM-5, and this has since become the ‘bench-mark’ lean NOxcatalyst. A large number of studies have been performed on this catalyst system, and the characteristic features of the reaction over this material are fairly well defined. These characteristic features are collected together and analysed within this review article. In addition, a number of investigators have attempted to determine the reaction mechanism over this catalyst. These studies are discussed in detail, and the evidence both for and against each of the mechanistic proposals is assessed. Mechanistic studies performed on related catalyst systems are also reviewed herein, and are discussed with respect to the work carried out on Cu/ZSM-5.