Wednesday, December 24, 2014

Direct, Nonoxidative Conversion of Methane to Ethylene, Aromatics, and Hydrogen

Direct, Nonoxidative Conversion of Methane to Ethylene, Aromatics, and Hydrogen

Type
Journal Article
Author
Xiaoguang Guo
Author
Guangzong Fang
URL
Volume
344
Issue
6184
Pages
616-619
Publication
Science
Date
05/09/2014
Abstract
The efficient use of natural gas will require catalysts that can activate the first C–H bond of methane while suppressing complete dehydrogenation and avoiding overoxidation. Authors report that single iron sites embedded in a silica matrix enable direct, nonoxidative conversion of methane, exclusively to ethylene and aromatics.
The reaction is initiated by catalytic generation of methyl radicals, followed by a series of gas-phase reactions. The absence of adjacent iron sites prevents catalytic C-C coupling, further oligomerization, and coke deposition.

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