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题名: The effect of chromium on sulfur resistance of Pd/HY-Al2O3 catalysts for aromatic hydrogenation
作者: Hu, LJ;  Xia, GF;  Qu, LL;  Li, MF;  Li, C;  Xin, Q;  Li, DD
关键词: palladium ;  chromium ;  Y zeolite ;  alumina ;  sulfur resistance ;  toluene hydrogenation
刊名: JOURNAL OF CATALYSIS
发表日期: 2001-09-10
卷: 202, 期:2, 页:220-228
收录类别: SCI
文章类型: Article
部门归属: 5076
项目归属: 503
WOS标题词: Science & Technology ;  Physical Sciences ;  Technology
类目[WOS]: Chemistry, Physical ;  Engineering, Chemical
研究领域[WOS]: Chemistry ;  Engineering
英文摘要: Sulfur is a major poison to noble metal catalysts for deep aromatic hydrogenation in the petroleum refining industry. In order to study the sulfur resistance of Pd-based catalysts, a series of Pd, Cr, and PdCr catalysts supported on HY-Al2O3 were studied by NH3-TPD, pyridine-adsorption IR, TPR, IR spectra of adsorbed CO, and toluene hydrogenation in the presence of 3000 ppm sulfur as thiophene under the following conditions: 533-573 K, 4.2 MPa, and WHSV 4.0 h(-1). Cr has no influence on the acidity of the catalysts. TPR patterns and in situ IR spectra of adsorbed CO revealed a strong interaction between Cr and Pd, and the frequency shift of linear bonded CO on Pd indicates that the electron density of Pd decreases with the increase of the Cr/Pd atomic ratio. The catalytic performance of Pd, Cr, and PdCr catalysts shows that the sulfur resistance of Pd is strongly enhanced by Cr, and the activity reaches its maximum when the Cr/Pd atomic ratio equals 8. The active phase model "Pd particles decorated by Cr2O3" is postulated to explain the behavior of PdCr catalysts. (C) 2001 Academic Press.
关键词[WOS]: PD-PT CATALYSTS ;  TOLUENE HYDROGENATION ;  CARBON-MONOXIDE ;  NAPHTHALENE HYDROGENATION ;  INFRARED-SPECTROSCOPY ;  BIMETALLIC CATALYSTS ;  SUPPORTED PALLADIUM ;  ALUMINA CATALYSTS ;  ORTHO-XYLENE ;  META-XYLENE
语种: 英语
原文出处: 查看原文
WOS记录号: WOS:000170995900002
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/91277
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.SINOPEC, 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. The effect of chromium on sulfur resistance of Pd/HY-Al2O3 catalysts for aromatic hydrogenation[J]. JOURNAL OF CATALYSIS,2001,202(2):220-228.
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