文献类型：期刊文献

英文题名：Synthesis and catalytic characterization of ZSM-5 zeolite with uniform mesopores prepared in the presence of a novel organosiloxane

作者：Song, Guoqiang Xue, Da Xue, Jianwei Li, Fuxiang

第一作者：Song, Guoqiang;宋广强

通信作者：Li, FX[1]

机构：[1]Guizhou Inst Technol, 1st Caiguan Rd, Guiyang 550003, Guizhou Provinc, Peoples R China;[2]Taiyuan Univ Technol, Coll Chem & Chem Engn, Taiyuan 030024, Shanxi Province, Peoples R China

第一机构：贵州理工学院

通信机构：corresponding author), Taiyuan Univ Technol, Inst Special Chem, 79 West Yingze St, Taiyuan 030024, Shanxi Province, Peoples R China.

年份：2017

卷号：248

起止页码：192-203

外文期刊名：MICROPOROUS AND MESOPOROUS MATERIALS

收录：;EI(收录号：20171703602739);Scopus(收录号：2-s2.0-85018550754);WOS:【SCI-EXPANDED(收录号:WOS:000402497200023)】；

基金：This work is supported by the National Natural Science Foundation of China (50972097) and the Natural Science Foundation of ShanXi (2014011012-4).

语种：英文

外文关键词：Mesoporous ZSM-5 zeolite; Organosiloxane; Hydrothermal stability; Ion-exchange; Catalysis

摘要：Intracrystal-mesoporous ZSM-5 zeolites of varying SiO2/Al2O3 molar ratios with different morphologies have been synthesized by employing a novel organosiloxane (OSO) as mesopore-directing template. In comparison to the previously reported ZSM-5 zeolites with mesoporosity, the mesoporous ZSM-5 zeolites obtained in this paper have high hierarchical factor (HF, 0.13-0.18), meaning that little microporosity has been consumed with abundant mesopores introduced within zeolite frameworks. The effects of tetrapropylammonium hydroxide (TPAOH), SiO2/Al(2)O3 molar ratios, crystallization temperature and crystallization time on the morphologies and textural properties of the products have been discussed in detail. The synthesized mesoporous ZSM-5 zeolites were characterized with X-ray diffraction (XRD), nitrogen sorption, scanning electron microscopy (SEM), transmission electron microscopy (TEM), nuclear magnetic resonance (NMR) spectroscopy, inductively coupled plasma (ICP) optical emission spectroscopy, the temperature-programmed desorption of NH3 technique (NH3-TPD) and thermogravimetric (TG)/differential scanning calorimetry (DSC) techniques. The outstanding hydrothermal stability of mesoporous ZSM-5 zeolites have been demonstrated by the hydrothermal treatment test. The Na+ ion-exchange test exhibits obvious superiority compared to traditional ZSM-5 zeolite. And the primary catalytic performance in reaction of cracking of 1, 3, 5-tri-isopropylbenzene also exhibits excellent conversion activity and products selectivity. (C) 2017 Elsevier Inc. All rights reserved.