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Ru–Cd/Bentonite for the Partial Hydrogenation of Benzene: A Catalyst without Additives
Author(s) -
Wang Weitao,
Liu Huizhen,
Ding Guodong,
Zhang Peng,
Wu Tianbin,
Jiang Tao,
Han Buxing
Publication year - 2012
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.201200272
Subject(s) - cyclohexene , catalysis , bentonite , chemistry , selectivity , benzene , yield (engineering) , hydrogen , inorganic chemistry , nuclear chemistry , organic chemistry , materials science , chemical engineering , metallurgy , engineering
Clays are very promising, environmentally benign catalyst supports. Herein, Ru–Cd/bentonite (BEN) catalysts were prepared and characterized by TEM, SEM, XPS, and XRD. The as‐prepared catalysts were used to catalyze the selective hydrogenation of benzene into cyclohexene with different Ru/Cd molar ratios, hydrogen pressures, and reaction temperatures. We found that the catalytic activity decreased with decreasing Ru/Cd molar ratio, whereas the selectivity was enhanced. The most‐favorable Ru/Cd molar ratio was 1 and the optimal hydrogen pressure and temperature were 5 MPa and 150 °C, respectively. The yield of cyclohexene reached 24.8 % over Ru–Cd/BEN under the optimal reaction conditions without the need for any additives in the reaction system and this catalyst could be reused several times in the reaction without a drop in the yield of cyclohexene. The Cd in the catalyst enhanced the selectivity for cyclohexene. Furthermore, Cd/BEN could be used an as effective supported additive to promote the hydrogenation of benzene into cyclohexene catalyzed by Ru/BEN or Ru/SBA‐15.