Oxidant Activation Over Structural Defects of Oxide Catalysts in Oxidative Methane Coupling
作者:
ELENAN. VOSKRESENSKAYA,
VICTORIYAG. ROGULEVA,
ALEXANDERG. ANSHITS,
期刊:
Catalysis Reviews
(Taylor Available online 1995)
卷期:
Volume 37,
issue 1
页码: 101-143
ISSN:0161-4940
年代: 1995
DOI:10.1080/01614949508007092
出版商: Taylor & Francis Group
关键词: Methane oxidative coupling;Oxidant activation;Oxygen defects;p-Type semiconductivity.
数据来源: Taylor
摘要:
Different aspects concerning the process of direct methane conversion to oxygen-containing products developed during more than half a century have been considered in previous reviews [1–3]. In particular, Gesser et al. [13 paid most attention to the homogeneous stages in methane conversion, while Foster [2] and Pitchai and Klier [3] examined the effect of different catalysts on methanol and formaldehyde formation. At present the main product of the homogeneous methane oxidation process with oxygen is shown to be methanol formed according to a chain-branching mechanism. In the presence of homogeneous initiators [4] (benzene, 2,2,4- trimethylpentane, etc.) or heterogeneous catalysts [2,3,5,6], formaldehyde is formed together with CH30H. However, the yield of the desirable products is low and does not exceed 8–10%. Charged atomic oxygen forms are considered to take part in the process of catalytic methane oxidation.
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