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Time‐resolved 13 C MAS NMR investigation of chemical reactions: the MTG process
Author(s) -
Mildner Toralf,
Ernst Horst,
Freude Dieter,
Kärger Jörg,
Winkler Ulf
Publication year - 1999
Publication title -
magnetic resonance in chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.483
H-Index - 72
eISSN - 1097-458X
pISSN - 0749-1581
DOI - 10.1002/(sici)1097-458x(199912)37:13<s38::aid-mrc535>3.0.co;2-8
Subject(s) - chemistry , methanol , magic angle spinning , nuclear magnetic resonance spectroscopy , dimethyl ether , analytical chemistry (journal) , spinning , spectroscopy , gasoline , magic angle , alkane , organic chemistry , polymer chemistry , catalysis , physics , quantum mechanics
Sample heating with a laser beam facilitates time‐dependent magic angle spinning (MAS) NMR spectroscopy of high‐temperature reactions in situ . The methanol‐to‐gasoline conversion (MTG process) was monitored by 13 C MAS NMR spectroscopy using the stop‐and‐go method in addition to the continuous heating of sealed samples. It was found that effective alkane formation is forced by interrupted laser heating. With a decrease of the dimethyl ether concentration a constant concentration of methanol was observed under both continuous and interrupted heating conditions. Copyright © 1999 John Wiley & Sons, Ltd.