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Non‐oxidative Coupling of Methane to Ethylene Using Mo 2 C/[B]ZSM‐5
Author(s) -
Sheng Huibo,
Schreiner Edward P.,
Zheng Weiqing,
Lobo Raul F.
Publication year - 2018
Publication title -
chemphyschem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.016
H-Index - 140
eISSN - 1439-7641
pISSN - 1439-4235
DOI - 10.1002/cphc.201701001
Subject(s) - ethylene , oxidative coupling of methane , catalysis , x ray absorption spectroscopy , methane , chemistry , aromatization , benzene , selectivity , zsm 5 , zeolite , inorganic chemistry , naphthalene , photochemistry , absorption spectroscopy , organic chemistry , physics , quantum mechanics
Methane non‐oxidative coupling to ethylene was investigated on Mo 2 C/[B]ZSM‐5 catalyst at 923 K and atmospheric pressure. In contrast to Mo 2 C/[Al]ZSM‐5 catalysts for methane aromatization, this material exhibits very high ethylene selectivity (>90 %) and low aromatics (benzene and naphthalene) selectivity. The much weaker Brønsted acidity of [B]ZSM‐5 leads to a slow rate of ethylene oligomerization. The stability of the catalyst is greatly enhanced with 93 % of the initial reaction rate remaining after 18 h of time on stream. In‐situ UV/VIS spectra indicate that prior to carburization, mono/binuclear Mo oxides are initially well dispersed onto the zeolite support. Mo carbides clusters, formed during carburization with methane, appear similar to clusters formed in [Al]ZSM‐5, as indicated by the X‐ray Absorption Spectroscopy (XAS) data.