中国科学院大连化学物理研究所机构知识库
Advanced  
DICP OpenIR  > 中国科学院大连化学物理研究所  > 期刊论文
题名: Characterization and catalytic performance of TS-1 after heat treatment in different media
作者: Liu, XW;  Wang, XS;  Liu, HO;  Liu, YH;  Zhuang, JQ;  Bao, XH
关键词: TS-1 zeolite ;  heat treatment ;  propylene ;  epoxidation ;  propylene oxide
刊名: CHINESE JOURNAL OF CATALYSIS
发表日期: 2002-11-01
卷: 23, 期:6, 页:493-497
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology ;  Physical Sciences ;  Technology
类目[WOS]: Chemistry, Applied ;  Chemistry, Physical ;  Engineering, Chemical
研究领域[WOS]: Chemistry ;  Engineering
英文摘要: The structure and surface acidity of TS-1 were adjusted by heat treatment, in order to increase its selectivity for propylene oxide (PO) in epoxidation of propylene with H2O2. The TS-1 samples, treated at different temperatures (540, 650 and 750 degreesC) in the presence of different media(vapor or air), were characterized by XRF, XRD, FT-IR, UV-Vis, MAS NMR and NH3-TPD, to determine the changes of their framework structure, surface acid sites and total amount of acid. Using propylene epoxidation as a probe, the influence of the treatment conditions on their selectivity for PO was investigated. The results show that, with the treatment temperature increasing, the Bronsted acid sites and the total amount of acid decrease obviously, the selectivity for PO, especially over TS-1 sample treated at 750 degreesC in the presence of vapor, increases from 29% to 56%, while the catalytic activity remains constant. The amount of framework aluminum in TS-1 has changed after heat treatment, it decreases with treatment temperature increasing, especially in the presence of vapor. It can be concluded that the decrease in surface acidity of TS-1 is due to the removal of framework aluminum when TS-1 was treated at high temperature; while the decrease in surface acidity of TS-1 leads to the selectivity for PO increase. The Si-O tetrahedron is partly destroyed at high temperatures, and the framework titanium may convert into non-framework titanium, which further can be sintered to form anatase TiO2. The decrease in the amount of non-framework titanium in the presence of vapor shows that the presence of vapor favors to remove non-framework titanium of TS-1.
关键词[WOS]: ACIDIC PROPERTIES ;  TITANIUM-SILICALITES-1
语种: 英语
WOS记录号: WOS:000179903200005
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/139169
Appears in Collections:中国科学院大连化学物理研究所_期刊论文

Files in This Item:

There are no files associated with this item.


作者单位: 1.Dalian Univ Technol, State Key Lab Fine Chem, Dalian 116012, Peoples R China
2.Dalian Univ Technol, Inst Ind Catalysts, Dalian 116012, Peoples R China
3.Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Catalysis, Dalian 116023, Peoples R China

Recommended Citation:
Liu, XW,Wang, XS,Liu, HO,et al. Characterization and catalytic performance of TS-1 after heat treatment in different media[J]. CHINESE JOURNAL OF CATALYSIS,2002,23(6):493-497.
Service
 Recommend this item
 Sava as my favorate item
 Show this item's statistics
 Export Endnote File
Google Scholar
 Similar articles in Google Scholar
 [Liu, XW]'s Articles
 [Wang, XS]'s Articles
 [Liu, HO]'s Articles
CSDL cross search
 Similar articles in CSDL Cross Search
 [Liu, XW]‘s Articles
 [Wang, XS]‘s Articles
 [Liu, HO]‘s Articles
Related Copyright Policies
Null
Social Bookmarking
  Add to CiteULike  Add to Connotea  Add to Del.icio.us  Add to Digg  Add to Reddit 
所有评论 (0)
暂无评论
 
评注功能仅针对注册用户开放,请您登录
您对该条目有什么异议,请填写以下表单,管理员会尽快联系您。
内 容:
Email:  *
单位:
验证码:   刷新
您在IR的使用过程中有什么好的想法或者建议可以反馈给我们。
标 题:
 *
内 容:
Email:  *
验证码:   刷新

Items in IR are protected by copyright, with all rights reserved, unless otherwise indicated.

 

 

Valid XHTML 1.0!
Powered by CSpace