Dehydrocyclization of Alkanes Over Zeolite-Supported Metal Catalysts: Monofunctional or Bifunctional Route

IF 9.3 2区 化学 Q1 CHEMISTRY, PHYSICAL Catalysis Reviews-Science and Engineering Pub Date : 1997-02-01 DOI:10.1080/01614949708006467
P. Mériaudeau, C. Naccache
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引用次数: 137

Abstract

Abstract The direct catalytic conversion of alkanes into aromatics has found potentially important industrial applications. Initially only alkanes with 6 and more carbon atoms in the chain were concerned. Supported platinum catalysts were found active for the aromatization of alkanes; the drawbacks of these catalysts were their deactivation with time on stream and the existence of simultaneous parallel reactions. Much discussion has been published on the aromatization of C6+ alkanes. A bifunctional mechanism which involves both the metal and the acid sites of the support and a monofunctional mechanism involving only the metallic sites operate over, respectively, Pt supported on acidic support and Pt supported on nonacidic support. In the present review the mechanisms proposed for the aromatization of alkanes are described. Over monofunctional Pt catalysts two possible mechanisms prevail: 1,6 ring closure on the Pt surface involving primary and secondary C-H bond rupture, followed by dehydrogenation of the...
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沸石负载的金属催化剂上烷烃的脱氢环化:单官能或双官能路线
烷烃直接催化转化为芳烃已经发现了潜在的重要工业应用。最初,只有链上有6个或更多碳原子的烷烃被关注。负载型铂催化剂对烷烃芳构化反应活跃;这些催化剂的缺点是随着时间的推移而失活,同时存在平行反应。关于C6+烷烃的芳构化已经发表了很多讨论。一种双功能机制(包括载体的金属和酸位点)和一种单功能机制(只包括金属位点)分别作用于酸性载体上的铂和非酸性载体上的铂。本文介绍了烷烃芳构化的机理。在单功能Pt催化剂上,有两种可能的机制:Pt表面的1,6环闭合,包括初级和次级C-H键断裂,然后是催化剂的脱氢。
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来源期刊
CiteScore
22.30
自引率
2.80%
发文量
29
期刊介绍: Catalysis Reviews is dedicated to fostering interdisciplinary perspectives in catalytic science and engineering, catering to a global audience of industrial and academic researchers. This journal serves as a bridge between the realms of heterogeneous, homogeneous, and bio-catalysis, providing a crucial and critical evaluation of the current state of catalytic science and engineering. Published topics encompass advances in technology and theory, engineering and chemical aspects of catalytic reactions, reactor design, computer models, analytical tools, and statistical evaluations.
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