Direct Conversion of Methane to Methanol and Higher Hydrocarbons
作者： Jack H. Lunsford
DOI: 10.1016/S0167-2991(09)60527-9
关键词: Methoxide 、 Photodissociation 、 Chemistry 、 Partial oxidation 、 Radical 、 Oxide 、 Catalysis 、 Methane 、 Methanol 、 Inorganic chemistry
摘要: Abstract For the production of both oxygenates and higher hydrocarbons initial step in activation CH 4 over metal oxide catalysts appears to be formation methyl radicals. Although several types surface oxygen may effective abstracting H from at elevated temperatures, there is considerable experimental evidence support role O − ions this reaction. These formed by a one-electron transfer N 2 O, they generated photolysis (e.g. MoO 3 /SiO ), or result substitutional impurities Li + MgO). The resulting radicals either react reductive addition form methoxide desorb into gas phase. Under reacting conditions subsequently decompose HCHO with OH. phase coupling yields C 6 , which dehydrogenated . In all cases desired partial oxidation products are limited heterogeneous homogeneous secondary reactions. Generally, can activate methane also intermediates for further oxidation.
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