NDLI: Mechanistic Study of Selective Oxidation of Dimethyl Ether to Formaldehyde over Alumina-supported Molybdenum Oxide Catalyst

Content Provider	Springer Nature Link
Author	Huang, Xiumin Liu, Junlong Chen, Junli Xu, Yide Shen, Wenjie
Copyright Year	2006
Abstract	XPS and IR spectroscopies were used to investigate the surface intermediates of dimethyl ether (DME) oxidation to formaldehyde over MoOx/Al2O3 catalyst. The reaction performances were tested by employing three typical reaction conditions, depending on the O2/DME ratio and the reaction temperature. When there was sufficient oxygen present in the reaction media, a terminal or bridged CH3O* species formed by DME dissociation was highly active and rapidly reacted with lattice oxygen to produce formaldehyde, leading to higher selectivity of HCHO. When oxygen was consumed completely or only DME was present in the reaction media, CH3O species bonded to more than two Mo atoms (μ-OCH3) and CHx (x=1–3) species attached to the Mo atoms were observed and the relative ratio of (μ-OCH3) /Mo–CHx was significantly dependent on the reduction degree of MoOx domains. The (μCH3O) species was related to the formation of CH3OH or COx, and the Mo–CHx species led to the formation of CH4.
Starting Page	79
Ending Page	86
Page Count	8
File Format	PDF
ISSN	1011372X
Journal	Catalysis Letters
Volume Number	108
Issue Number	1-2
e-ISSN	1572879X
Language	English
Publisher	Kluwer Academic Publishers-Plenum Publishers
Publisher Date	2006-01-01
Publisher Place	New York
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	dimethyl ether formaldehyde XPS IR MoO3/γ-Al2O3 Physical Chemistry Industrial Chemistry/Chemical Engineering Catalysis Pharmacy
Content Type	Text
Resource Type	Article
Subject	Chemistry Catalysis

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