期刊
SOLID STATE NUCLEAR MAGNETIC RESONANCE
卷 35, 期 2, 页码 113-119出版社
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.ssnmr.2008.12.005
关键词
In situ NMR; High-temperature MAS NMR; Ethane; Zn/H-BEA zeolite; Kinetics; Aromatization
资金
- Russian Foundation for Basic research [07-03-00136]
- Deutsche Forschungsgemeinschaft [FR 902/15]
- Russian Science Support Foundation
Ethane conversion into aromatic hydrocarbons over Zn-modified zeolite BEA has been analyzed by high-temperature MAS NMR spectroscopy. Information about intermediates (Zn-ethyl species) and reaction products (mainly toluene and methane), which were formed under the conditions of a batch reactor, was obtained by C-13 MAS NMR. Kinetics of the reaction, which was monitored by H-1 MAS NMR in situ at the temperature of 573 K, provided information about the reaction mechanism. Simulation of the experimental kinetics within the frames of the possible kinetic schemes of the reaction demonstrates that a large amount of methane evolved under ethane aromatization arises from the stage of direct ethane hydrogenolysis. (C) 2009 Elsevier Inc. All rights reserved.
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