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题名: Alkali treatment upon MCM-49 zeolite with various contents of HMI in the presence of CTAB and application in anisole acylation with acetic anhydride
作者: Wei, Huijuan1, 2;  Xie, Sujuan1;  Gao, Ningning1, 3;  Liu, Kefeng1, 4;  Liu, Xiaohang1, 5;  Xin, Wenjie1;  Li, Xiujie1;  Liu, Shenglin1;  Xu, Longya1
关键词: MCM-49 zeolite ;  Template ;  Alkali-treatment ;  CTAB ;  Acylation
刊名: APPLIED CATALYSIS A-GENERAL
发表日期: 2015-04-05
DOI: 10.1016/j.apcata.2015.02.020
卷: 495, 页:152-161
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: A series of MCM-49 zeolites with various contents of hexamethyleneimine (HMI), obtained by calcination at different temperatures, were alkali-treated in NaOH solution containing cetyltrimethylammonium bromide (CTAB). Changes in structural and acidic properties of the resultant samples were systematically investigated by transmission electron microscopy and scanning electron microscopy (TEM and SEM), X-ray diffraction (XRD), N-2 and Ar adsorption/desorption isotherms measurements, ammonia temperature-programmed desorption (NH3-TPD) and pyridine adsorption/desorption followed by infrared measurements (Py-IR), as well as Si-29 MAS NMR techniques. It was revealed that only crevices were developed on the crystals of MCM-49 zeolite samples with more HMI, resulting in the increase of acid concentrations; whereas intracrystalline mesopores (ca. 3 nm) could be formed for the samples with less HMI at the expense of framework destruction. A bit of ordered mesoporous materials (OMMs) could also be detected from the latter samples, because the presence of CTAB could induce the re-assembly of dissolved species through the formation of micelle, originating from the desilication by NaOH. When the modified MCM-49 samples were used as catalysts for anisole acylation with acetic anhydride, due to the positive changes in acidities and pore structure properties, they exhibited better catalytic performances for the reaction than the unmodified HMCM-49 catalyst. (C) 2015 Elsevier B.V. All rights reserved.
关键词[WOS]: MICRO-MESOPOROUS MATERIALS ;  FRIEDEL-CRAFTS ACYLATION ;  BETA-ZEOLITE ;  CATALYTIC-PROPERTIES ;  DESILICATION ;  ZSM-5 ;  ACID ;  ALKYLATION ;  RECRYSTALLIZATION ;  DISPROPORTIONATION
语种: 英语
WOS记录号: WOS:000353850700018
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/146217
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.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
3.SINOPEC, Res Inst Petr Proc, Beijing 100083, Peoples R China
4.Petrochina Co Ltd, Petrochem Res Inst, Beijing 100029, Peoples R China
5.PetroChina Liaohe Petrochem Co, Panjin 124022, Peoples R China

Recommended Citation:
Wei, Huijuan,Xie, Sujuan,Gao, Ningning,et al. Alkali treatment upon MCM-49 zeolite with various contents of HMI in the presence of CTAB and application in anisole acylation with acetic anhydride[J]. APPLIED CATALYSIS A-GENERAL,2015,495:152-161.
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