The role of La in improving the selectivity to cyclohexene of Ru catalyst for hydrogenation of benzene

被引：14
|
作者：
Sun, Hai-Jie [1 ]
Dong, Ying-Ying [1 ]
Li, Shuai-Hui [1 ]
Jiang, Hou-Bing [1 ]
Zhang, Yuanxin [1 ]
Liu, Zhong-Yi [1 ]
Liu, Shou-Chang [1 ]
机构：
[1] Zhengzhou Univ, Coll Chem & Mol Engn, Zhengzhou 450001, Henan, Peoples R China
来源：
JOURNAL OF MOLECULAR CATALYSIS A-CHEMICAL | 2013年 / 368卷
关键词：
Benzene; Cyclohexene; Ru; La; Selective hydrogenation; LIQUID-PHASE HYDROGENATION; AMORPHOUS ALLOY CATALYSTS; AQUEOUS SALT-SOLUTION; RUTHENIUM CATALYSTS; ZN CATALYST; RU/SBA-15; CATALYSTS; PERFORMANCE; SILICA; XPS;
D O I：
10.1016/j.molcata.2012.12.001
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
Ru-La catalysts with different La/Ru molar ratios were prepared by co-precipitation. Characterizations revealed that the promoter La existed as La(OH)(3) on the Ru surface. The La(OH)(3) itself could not enhance the selectivity to cyclohexene of Ru catalyst. However, the La(OH)(3) could react with ZnSO4 in slurry to form an insoluble (Zn(OH)(2))(3)(ZnSO4)(H2O)(3) salt. The chemisorbed (Zn(OH)(2))(3)(ZnSO4)(H2O)(3) salt on Ru surface played a key role in improving the selectivity to cyclohexene of Ru catalyst. Ru-La catalyst with the optimum La/Ru molar ratio of 0.14 gave a maximum cyclohexene yield of 59.5%. Besides, Ru-La(0.14) catalyst had a good reusability and an excellent stability. (C) 2012 Elsevier B.V. All rights reserved.
引用
收藏
页码：119 / 124
页数：6
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