Mesoporous silica-supported Ni-B amorphous alloy catalysts for selective hydrogenation of 2-ethylanthraquinone

被引:72
作者
Chen, XY
Wang, S
Zhuang, JH
Qiao, MH [1 ]
Fan, KN
He, HY
机构
[1] Fudan Univ, Dept Chem, Shanghai 200433, Peoples R China
[2] Fudan Univ, Shanghai Key Lab Mol Catalysis & Innovat Mat, Shanghai 200433, Peoples R China
基金
中国国家自然科学基金;
关键词
Ni-B amorphous alloy; mesoporous silica; 2-ethylanthraquinone; hydrogenation; H2O2;
D O I
10.1016/j.jcat.2004.08.002
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
The effects of pore structure on the reaction rates and selectivities in the liquid-phase hydrogenation of 2-ethylanthraquinone over Ni-B amorphous alloy catalysts prepared by the reductant-impregnation method were studied by regular (HMS, MCM-41, and SBA-15) and commercial mesoporous silicas as supports. The composition, particle size, and location of the Ni-B particles were profoundly influenced by the pore structure of the supports. It is found that the location of the Ni-B particles depended on the pore size of the supports, whereas the uniformity of particle size was related to the interaction between the Ni-B particles and the supports. The hydrogenation rate was much faster on Ni-B catalysts with pore diameters exceeding 5 nm than on the narrow-pore catalysts, whereas the selectivity to 2-ethyldihydroanthraquinone, the carbonyl group hydrogenation product, was higher on Ni-B catalysts supported on regular mesoporous silicas. The best activity and selectivity were achieved when using SBA-15 as the support, which is attributable to the formation of more uniform active sites due to the unique pore structure of SBA-15. (C) 2004 Elsevier Inc. All rights reserved.
引用
收藏
页码:419 / 427
页数:9
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