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Doping effects of B in ZrO2 on structural and catalytic properties of Ru/B-ZrO2 catalysts for benzene partial hydrogenation
Zhou, GB; Pei, Y; Jiang, Z; Fan, KN; Qiao, MH; Sun, B; Zong, BN; mhqiao@fudan.edu.cn; zongbn.ripp@sinopec.com
2014
Source PublicationJOURNAL OF CATALYSIS
ISSN0021-9517
Volume311Pages:393—403
AbstractThe B-doped ZrO2 (B-ZrO2) samples with different B/Zr ratios were synthesized using zirconium oxychloride and boric acid as the precursors. Their crystallographic phase retained as tetragonal ZrO2 after the doping of B; however, the amount of the Lewis acid sites increased from 46.1 mu mol(NH3) g(-1), on ZrO2 to 100.6 mu mol(NH3) g(-1) on B-ZrO2(1/10) with the nominal B/Zr molar ratio of 1/10. The Ru/B-ZrO2 catalysts were then prepared by chemical reduction, and their electronic and structural properties were systematically characterized by spectroscopic techniques. It is identified that the Ru nanoparticles (NPs) supported on these B-ZrO2 samples exhibited similar size, chemical state, and microstructure. In the partial hydrogenation of benzene, the turnover frequency of benzene was linearly proportional to the amount of the acid sites on the supports, whereas the selectivity toward cyclohexene displayed a volcanic evolution passing through a maximum of 88% on the Ru/B-ZrO2(1/15) catalyst. Kinetic analysis indicated that the acid sites improved the rate constants of the benzene to cyclohexene step (k(1)) and the cyclohexene to cyclohexane step (k(2)) to different degrees. The resulting k(1)/k(2) ratio increased from 3.7 x 10(-2) l mol(-1) (Ru/ZrO2) to 4.8 x 10(-2) l mol(-1) (Ru/B-ZrO2(1/15)), and then declined to 4.1 x 10(-2) l mol(-1) (Ru/B-ZrO2(1/10)), which explained the volcanic evolution of the selectivity toward cyclohexene with respect to the acid amount. (C) 2014 Elsevier Inc. All rights reserved.
KeywordRay-absorption Spectroscopy Liquid-phase Hydrogenation Selective Hydrogenation Ruthenium Catalysts Ru-la-b/zro2 Catalyst Modifiable Character Acid Sites Ft-ir Cyclohexene Zeolite
Indexed BySCI
Language英语
WOS IDWOS:000333489500043
Citation statistics
Cited Times:42[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.sinap.ac.cn/handle/331007/14090
Collection中科院上海应用物理研究所2011-2019年
Corresponding Authormhqiao@fudan.edu.cn; zongbn.ripp@sinopec.com
Recommended Citation
GB/T 7714
Zhou, GB,Pei, Y,Jiang, Z,et al. Doping effects of B in ZrO2 on structural and catalytic properties of Ru/B-ZrO2 catalysts for benzene partial hydrogenation[J]. JOURNAL OF CATALYSIS,2014,311:393—403.
APA Zhou, GB.,Pei, Y.,Jiang, Z.,Fan, KN.,Qiao, MH.,...&zongbn.ripp@sinopec.com.(2014).Doping effects of B in ZrO2 on structural and catalytic properties of Ru/B-ZrO2 catalysts for benzene partial hydrogenation.JOURNAL OF CATALYSIS,311,393—403.
MLA Zhou, GB,et al."Doping effects of B in ZrO2 on structural and catalytic properties of Ru/B-ZrO2 catalysts for benzene partial hydrogenation".JOURNAL OF CATALYSIS 311(2014):393—403.
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