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Catalytic Methylation of Aromatic Hydrocarbons using CO 2 /H 2 over Re/TiO 2 and H‐MOR Catalysts
Author(s) -
Ting Kah Wei,
Kamakura Haruka,
Poly Sharmin S.,
Toyao Takashi,
Hakim Siddiki S. M. A.,
Maeno Zen,
Matsushita Koichi,
Shimizu Kenichi
Publication year - 2020
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.202000036
Subject(s) - catalysis , benzene , yield (engineering) , chemistry , selectivity , nuclear chemistry , medicinal chemistry , organic chemistry , materials science , metallurgy
A combined catalyst comprising TiO 2 ‐supported Re (Re(1)/TiO 2 ; Re=1 wt%) and H‐MOR (SiO 2 /Al 2 O 3 =90) was found to promote the methylation of benzene using CO 2 and H 2 . This catalytic system exhibited high performance with regard to the synthesis of methylated benzenes and gave high yields of total methylated products (up to 52 % benzene‐based yield and 42 % CO 2 ‐based yield) under the reaction conditions employed in this study ( p CO2 =1 MPa; p H2 =5 MPa; T =250 °C; t =20 h) in a batch reactor. Catalyst screening demonstrated that a combination of Re(1)/TiO 2 and H‐MOR (SiO 2 /Al 2 O 3 =90) exhibited superior performance compared to other combinations of supported metal catalysts and zeolites in terms of both yield and selectivity for methylated benzenes.