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题名: Epoxidation of propylene on NaCl-modified silver catalysts with air as the oxidant
作者: Lu, JQ;  Luo, MF;  Lei, H;  Li, C
关键词: propylene ;  epoxidation ;  silver catalyst
刊名: APPLIED CATALYSIS A-GENERAL
发表日期: 2002-11-01
卷: 237, 期:1-2, 页:11-19
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology ;  Physical Sciences ;  Life Sciences & Biomedicine
类目[WOS]: Chemistry, Physical ;  Environmental Sciences
研究领域[WOS]: Chemistry ;  Environmental Sciences & Ecology
英文摘要: Propylene epoxidation by air was carried out on NaCl-modified silver (NaCl/Ag) catalysts, and the catalysts were characterized by X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS). The effects of NaCl loadings, propylene to oxygen ratio, and the reaction time on the catalytic performance were investigated. It was found that the addition of NaCl to silver significantly increases the propylene oxide (PO) selectivity. The PO yield has a maximum when the NaCl loading is about 10 wt.%. Also 12.4% conversion of propylene and 31.6% selectivity to PO are obtained on the NaCl/Ag (10 wt.%) catalyst at 350 degreesC, space velocity 1.8 x 10(4) h(-1) and C3H6:O-2 = 1:2. XPS and XRD characterizations show that AgCl formed on the silver catalyst was favorable to propylene epoxidation. A compound with highly oxidized Ag ion was also found, which may be effective for the reaction. (C) 2002 Elsevier Science B.V. All rights reserved.
关键词[WOS]: TITANIUM SILICALITE ;  PHASE EPOXIDATION ;  OXYGEN ;  ADSORPTION ;  HYDROGEN ;  OXIDATION ;  CHLORINE ;  OLEFINS ;  PROPENE
语种: 英语
原文出处: 查看原文
WOS记录号: WOS:000178631500002
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/84945
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.Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Catalysis, Dalian 116023, Peoples R China

Recommended Citation:
Lu, JQ,Luo, MF,Lei, H,et al. Epoxidation of propylene on NaCl-modified silver catalysts with air as the oxidant[J]. APPLIED CATALYSIS A-GENERAL,2002,237(1-2):11-19.
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