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The Modifiable Character of a Novel Ru‐Fe‐B/ZrO 2 Catalyst for Benzene Selective Hydrogenation to Cyclohexene
Author(s) -
Liu Zhongyi,
Sun Haijie,
Wang Dongbin,
Liu Shouchang,
Li Zhongjun
Publication year - 2010
Publication title -
chinese journal of chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.28
H-Index - 41
eISSN - 1614-7065
pISSN - 1001-604X
DOI - 10.1002/cjoc.201090321
Subject(s) - cyclohexene , chemistry , catalysis , selectivity , benzene , yield (engineering) , physisorption , inorganic chemistry , nuclear chemistry , organic chemistry , metallurgy , materials science
A novel Ru‐Fe‐B/ZrO 2 catalyst for the selective hydrogenation of benzene to cyclohexene was prepared by the chemical reduction method. A yield of cyclohexene of 57.3% was achieved at benzene conversion of 80.6% on this catalyst. The activity and yield of cyclohexene were higher than those studied previously. The structural characterizations of the catalyst were performed by TEM‐SAED, XRD, and N 2 ‐physisorption. Moreover, cyclohexene selectivities on this catalyst increased and the activities decreased with the increase of the ZnO dosages, however, the activities increased and cyclohexene selectivities decreased with the increase of the H 2 SO 4 dosages. Different feeding manners of H 2 SO 4 or ZnO exerted definitely influence on the performances of this catalyst, but the degrees of influence were different due to the character of chemisorptions. Furthermore, the activity and cyclohexene selectivity on the catalysts could be reversibly modified by adding H 2 SO 4 or ZnO into reaction slurry, which provides an easy method to recover the activity and selectivity of Ru‐Fe‐B/ZrO 2 catalysts during the process of producing cyclohexene. And the modifiable mechanisms involved were speculated.