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Strong effect of transitional metals on the sulfur resistance of Pd/HY-Al2O3 catalysts for aromatic hydrogenation
Hu, LJ; Xia, GF; Qu, LL; Li, C; Xin, Q; Li, DD
KeywordPalladium Bimetallic Catalyst Y-zeolite Sulfur Resistance Aromatic Hydrogenation
Source PublicationJOURNAL OF MOLECULAR CATALYSIS A-CHEMICAL
2001-06-12
Volume171Issue:1-2Pages:169-179
Indexed BySCI
SubtypeArticle
Department5067
Funding Project503
WOS HeadingsScience & Technology ; Physical Sciences
WOS SubjectChemistry, Physical
WOS Research AreaChemistry
WOS KeywordPD-PT CATALYSTS ; SUPPORTED PLATINUM CATALYSTS ; GAS-PHASE HYDROGENATION ; TOLUENE HYDROGENATION ; BIMETALLIC CATALYSTS ; ZEOLITE CATALYSTS ; USY ZEOLITE ; BENZENE ; SILICA ; HYDRODESULFURIZATION
AbstractIn 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.
Language英语
URL查看原文
WOS IDWOS:000169317100018
Citation statistics
Cited Times:12[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://cas-ir.dicp.ac.cn/handle/321008/92119
Collection中国科学院大连化学物理研究所
Affiliation1.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
GB/T 7714
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.
APA Hu, LJ,Xia, GF,Qu, LL,Li, C,Xin, Q,&Li, DD.(2001).Strong effect of transitional metals on the sulfur resistance of Pd/HY-Al2O3 catalysts for aromatic hydrogenation.JOURNAL OF MOLECULAR CATALYSIS A-CHEMICAL,171(1-2),169-179.
MLA Hu, LJ,et al."Strong effect of transitional metals on the sulfur resistance of Pd/HY-Al2O3 catalysts for aromatic hydrogenation".JOURNAL OF MOLECULAR CATALYSIS A-CHEMICAL 171.1-2(2001):169-179.
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