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: Improvement of vapor-phase silylation and thermal stability of silylated MCM-22 zeolite
作者: Gao, Ningning1, 2;  Xie, Sujuan1;  Liu, Shenglin1;  Li, Xiujie1;  Xu, Longya1
关键词: MWW ;  Vapor-phase silylation ;  Thermal stability ;  Pillaring structure
刊名: JOURNAL OF POROUS MATERIALS
发表日期: 2013-10-01
DOI: 10.1007/s10934-013-9705-3
卷: 20, 期:5, 页:1217-1224
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 ;  Materials Science, Multidisciplinary
研究领域[WOS]: Chemistry ;  Materials Science
英文摘要: The method of vapor-phase silylation over as-made MCM-22 was improved through the replacement of deionized water with NaOH solution that absorbed HCl produced during the vapor-phase silylation. Also, the thermal stability of silylated MCM-22 was investigated by X-ray diffraction, N-2 adsorption-desorption, pyridine adsorption and desorption followed by infrared measurement and nuclear magnetic resonance techniques. The results showed that this improvement was beneficial for dichlorodimethylsilane molecules to enter the interlayer of MCM-22 zeolite to form pillaring structure. Both the interlayer pillaring structure and acidity of silylated MCM-22 varied with increasing thermal treatment temperature from 600 to 750 A degrees C. Specifically, the interlayer pillaring Si groups were thermally stable below 650 A degrees C, and damaged gradually with the increase of thermal treatment temperature from 650 to 750 A degrees C, leading to gradual decrease of the specific surface area and volume corresponding to interlayer supercages. At 750 A degrees C, the interlayer pillaring structure was destroyed completely, whereas the MWW structure was still maintained well. As to the variations of acid sites with thermal treatment temperature, different trend was observed. The amount of weak and strong Bronsted acid sites, as well as that of strong Lewis acid sites decreased gradually with increasing thermal treatment temperature to 650 A degrees C, but remained almost unchanged when the temperature was further increased to 750 A degrees C.
关键词[WOS]: PILLARED MOLECULAR-SIEVE ;  M-XYLENE TRANSFORMATION ;  SI-29 MAS-NMR ;  TOLUENE DISPROPORTIONATION ;  H-MCM-22 ZEOLITE ;  PORE SYSTEMS ;  P-XYLENE ;  CATALYTIC-PROPERTIES ;  DELAMINATED ZEOLITE ;  ACID PROPERTIES
语种: 英语
WOS记录号: WOS:000324103300027
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/137840
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.Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Catalysis, Dalian 116023, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China

Recommended Citation:
Gao, Ningning,Xie, Sujuan,Liu, Shenglin,et al. Improvement of vapor-phase silylation and thermal stability of silylated MCM-22 zeolite[J]. JOURNAL OF POROUS MATERIALS,2013,20(5):1217-1224.
Service
 Recommend this item
 Sava as my favorate item
 Show this item's statistics
 Export Endnote File
Google Scholar
 Similar articles in Google Scholar
 [Gao, Ningning]'s Articles
 [Xie, Sujuan]'s Articles
 [Liu, Shenglin]'s Articles
CSDL cross search
 Similar articles in CSDL Cross Search
 [Gao, Ningning]‘s Articles
 [Xie, Sujuan]‘s Articles
 [Liu, Shenglin]‘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