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题名: Epoxidation of styrene on a novel titanium-silica catalyst prepared by ion beam implantation
作者: Yang, QH;  Li, C;  Yuan, SD;  Li, J;  Ying, PL;  Xin, Q;  Shi, WD
刊名: JOURNAL OF CATALYSIS
发表日期: 1999-04-01
卷: 183, 期:1, 页:128-130
收录类别: SCI
文章类型: Article
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: A Ti-SiO2 catalyst with highly isolated titanium ions was prepared by ion beam implantation. The catalyst was tested for the epoxidation of styrene using dilute H2O2 (30%) as the oxidizing agent. Two kinds of product were formed: epoxide and benzaldehyde. The selectivity for epoxide approaches 100% at 298 K and decreases at elevated reaction temperatures, A turnover frequency for styrene up to 11.7 h(-1) was observed. The activity and selectivity for epoxide decreased when the catalyst was calcined at higher temperatures, It is proposed that there are at least two types of active sites on the catalyst: Ti(alpha) (isolated Ti3+ and Ti4+) for the selective formation of epoxide and Ti(beta) (TiO2 clusters) for the formation of benzaldehyde. (C) 1999 Academic Press.
关键词[WOS]: HYDROGEN-PEROXIDE ;  OXIDATION ;  ALKENES ;  ALKANES ;  H2O2
语种: 英语
WOS记录号: WOS:000079620200016
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/138532
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
2.Dalian Univ Technol, State Key Lab Mat Modificat Laser Ion & Electron, Dalian 116023, Peoples R China

Recommended Citation:
Yang, QH,Li, C,Yuan, SD,et al. Epoxidation of styrene on a novel titanium-silica catalyst prepared by ion beam implantation[J]. JOURNAL OF CATALYSIS,1999,183(1):128-130.
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