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Hierarchical Zr‐MTW Zeolites Doped with Copper as Catalysts of Ethanol Conversion into 1,3‐Butadiene
Author(s) -
Kurmach Mykhailo M.,
Larina Olga V.,
Kyriienko Pavlo I.,
Yaremov Pavlo S.,
Trachevsky Volodymyr V.,
Shvets Oleksiy V.,
Soloviev Sergiy O.
Publication year - 2018
Publication title -
chemistryselect
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.437
H-Index - 34
ISSN - 2365-6549
DOI - 10.1002/slct.201801971
Subject(s) - fourier transform infrared spectroscopy , catalysis , magic angle spinning , copper , chemistry , inorganic chemistry , pyridine , lewis acids and bases , zeolite , infrared spectroscopy , nuclear chemistry , nuclear magnetic resonance spectroscopy , organic chemistry , chemical engineering , engineering
The hierarchical Zr‐MTW zeolites are prepared using NH 4 F and HF as mineralizing agents and structure‐directed agent like Gemini‐type surfactant and studied by X‐ray diffraction (XRD), 29 Si magic angle spinning nuclear magnetic resonance ( 29 Si MAS NMR), Fourier transform infrared (FTIR) spectroscopy with pyridine, 2,6‐di‐tert‐butylpyridine and CD 3 CN as probe molecules. Structural characteristics and acid‐base properties of the zeolites depend on concentration of fluorine precursor in the reaction medium (a ratio of Si/F). The hierarchical Zr‐MTW zeolites (included doped with copper) have been tested in ethanol conversion into 1,3‐butadiene by Lebedev method. The symbatical dependence of 1,3‐butadiene productivity with the concentration of Lewis acidic sites determined by FTIR spectroscopy of adsorbed CD 3 CN is observed. 1.3‐Butadiene selectivity of 68 % with ethanol conversion of 81 % are achieved in the presence of Cu/Zr‐MTW catalyst.