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Catalytic Performance of Layered Double Hydroxides (LDHs) Derived Materials in Gas‐Solid and Liquid‐Solid Phase Reactions
Author(s) -
Huang Liang,
MegíasSayago Cristina,
Bingre Rogeria,
Zheng Qianwen,
Wang Qiang,
Louis Benoît
Publication year - 2019
Publication title -
chemcatchem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.497
H-Index - 106
eISSN - 1867-3899
pISSN - 1867-3880
DOI - 10.1002/cctc.201900499
Subject(s) - layered double hydroxides , catalysis , thermogravimetric analysis , methanol , selectivity , dimethyl ether , fourier transform infrared spectroscopy , coprecipitation , materials science , inorganic chemistry , chemistry , nuclear chemistry , chemical engineering , organic chemistry , engineering
Novel layered double hydroxides (LDHs) were prepared by a co‐precipitation method and characterised using X‐ray diffraction (XRD), Fourier transformed infrared spectroscopy (FT‐IR), Thermogravimetric analysis (TGA) and scanning electron microscopy (SEM). As‐prepared LDH derived catalysts were first evaluated in the gas‐phase conversion of methanol. The results indicate that LDH derived materials act as selective catalysts towards dimethyl ether (DME), methane or light olefins formation, depending on their chemical composition. For instance, CuAlO x showed a high selectivity in DME up to 88 %, whilst CuCoO x converted methanol to CH 4 , C 3 H 8 and DME. NiFeO x allowed achieving a full methanol conversion selectively into CH 4 during at least 1800 min. Besides, Ni and Cu‐LDHs were successfully tested in the liquid phase benzyl alcohol (BzOH) oxidation leading to more than 50 % conversion. NiAl‐LDH appeared as the best catalyst for benzaldehyde production with a 71 % conversion and 100 % selectivity.