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题名: Strong effect of transitional metals on the sulfur resistance of Pd/HY-Al2O3 catalysts for aromatic hydrogenation
作者: Hu, LJ;  Xia, GF;  Qu, LL;  Li, C;  Xin, Q;  Li, DD
关键词: palladium ;  bimetallic catalyst ;  Y-zeolite ;  sulfur resistance ;  aromatic hydrogenation
刊名: JOURNAL OF MOLECULAR CATALYSIS A-CHEMICAL
发表日期: 2001-06-12
卷: 171, 期:1-2, 页:169-179
收录类别: SCI
文章类型: Article
部门归属: 5067
项目归属: 503
WOS标题词: Science & Technology ;  Physical Sciences
类目[WOS]: Chemistry, Physical
研究领域[WOS]: Chemistry
英文摘要: In order to improve the sulfur resistance of noble metal catalysts in the aromatic hydrogenation of diesel fuel, the alloying effect of non-noble metals with Pd was studied. Toluene hydrogenation over Pd and Pd-M bimetallic catalysts (M = Cr, W,La, Mn, Mo, Ag) on a mixed HY-Al2O3 support was investigated in the presence of 3000 ppm sulfur as thiophene in the feedstock. The results showed that the addition of the second metals strongly affected the activity of toluene hydrogenation, which suggests that the sulfur resistibility of Pd-M bimetallic catalysts is much different from single Pd. La, Mn, Mo and Ag decreased the sulfur resistance of the palladium catalysts. For example, the toluene conversion at 553 K was observed to decrease sharply from 39.4 wt.% on Pd to 1.6 wt.% on Pd-Ag, which is by a factor of 25. One of the important findings in this article is that Cr and W increase hydrogenation activity of Pd catalysts. The reactions occurring on these catalysts include hydrogenation, isomerization and hydrocracking, The addition of the second metals has no noticeable effects on the hydrogenation and isomerization selectivity, but it slightly suppresses hydrocracking reactions. The four typical catalysts, Pd-Cr, Pd-W, Pd-Ag and Pd were characterized by infrared (IR) spectroscopy of pyridine and CO. LR spectra of CO revealed the strong interaction between Pd and the second metal as Cr, W and Ag (or their oxide), indicating that the improvement in sulfur resistance originates from electron-deficient Pd with the addition of second metals. (C) 2001 Elsevier Science B.V. All rights reserved.
关键词[WOS]: PD-PT CATALYSTS ;  SUPPORTED PLATINUM CATALYSTS ;  GAS-PHASE HYDROGENATION ;  TOLUENE HYDROGENATION ;  BIMETALLIC CATALYSTS ;  ZEOLITE CATALYSTS ;  USY ZEOLITE ;  BENZENE ;  SILICA ;  HYDRODESULFURIZATION
语种: 英语
原文出处: 查看原文
WOS记录号: WOS:000169317100018
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/92119
Appears in Collections:中国科学院大连化学物理研究所_期刊论文

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作者单位: 1.Chian Petrochem Corp, Res Inst Petr Proc, Beijing 100083, Peoples R China
2.Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Catalysis, Dalian 116023, Peoples R China

Recommended Citation:
Hu, LJ,Xia, GF,Qu, LL,et al. Strong effect of transitional metals on the sulfur resistance of Pd/HY-Al2O3 catalysts for aromatic hydrogenation[J]. JOURNAL OF MOLECULAR CATALYSIS A-CHEMICAL,2001,171(1-2):169-179.
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