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现代化工  2020, Vol. 40 Issue (9): 131-135,141    DOI: 10.16606/j.cnki.issn0253-4320.2020.09.027
  科研与开发 本期目录 | 过刊浏览 | 高级检索 |
核壳结构Pt@ZSM-5@S-1分子筛用于甲苯甲醇烷基化制对二甲苯的研究
齐美美1, 李孝国2, 常洋2, 赵成浩1, 张安峰1, 侯章贵2, 郭新闻1
1. 大连理工大学精细化工国家重点实验室, 辽宁 大连 116024;
2. 中海油炼油化工科学研究院, 北京 102209
Core-shell Pt@ZSM-5@S-1 molecular sieve for alkylation of toluene and methanol to make p-xylene
QI Mei-mei1, LI Xiao-guo2, CHANG Yang2, ZHAO Cheng-hao1, ZHANG An-feng1, HOU Zhang-gui2, GUO Xin-wen1
1. State Key Laboratory of Fine Chemicals, Dalian University of Technology, Dalian 116024, China;
2. CNOOC Research Institute of Refining and Petrochemicals, Beijing 102209, China
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摘要 以四丙基氢氧化铵为模板剂、正硅酸乙酯为硅源、硫酸铝为铝源,采用原位的方法直接合成出Pt@ZSM-5分子筛,通过外延生长法在Pt@ZSM-5表面生长Silicalite-1壳层,制备具有核壳结构且表面富硅的含Pt分子筛催化剂。通过XRD、SEM、TEM、N2吸附-脱附、ICP-AES、TG等表征手段对催化剂进行表征,并考察不同壳层厚度的Pt@ZSM-5@S-1分子筛在甲苯甲醇烷基化反应中的性能。结果表明,随着壳层厚度的增加,甲苯转化率逐渐降低,对二甲苯的选择性不断提高。
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齐美美
李孝国
常洋
赵成浩
张安峰
侯章贵
郭新闻
关键词:  ZSM-5  核壳分子筛  择形催化  烷基化反应  对二甲苯    
Abstract: Taking tetrapropylammonium hydroxide as a template,tetraethyl orthosilicate as silicon source,and aluminum sulfate as aluminum source,Pt@ZSM-5 molecular sieve is directly synthesized by in-situ synthesis method.Silicaite-1 shell grows on the surface of Pt@ZSM-5 via epitaxial growth method,and a Pt molecular sieve catalyst with core-shell structure and silicon-rich surface is gained.The catalyst is characterized by X-ray diffraction (XRD),scanning electron microscopy (SEM),transmission electron microscopy (TEM),N2 adsorption-desorption,inductively coupled plasma (ICP-AES),and thermogravimetry (TG).The catalytic performance of Pt@ZSM-5@S-1 molecular sieves with different shell layers thickness is evaluated in the alkylation of toluene and methanol.The results show that as the thickness of the shell increases,the conversion of toluene gradually decreases and the selectivity of para-xylene increases.
Key words:  ZSM-5    core-shell molecular sieve    shape selective catalysis    alkylation reaction    p-xylene
收稿日期:  2019-11-30      修回日期:  2020-07-04          
ZTFLH:  TQ204.1  
通讯作者:  张安峰(1978-),男,博士,副教授,硕士生导师,研究方向为分子筛酸催化方面,通讯联系人,zhangaf@dlut.edu.cn。    E-mail:  zhangaf@dlut.edu.cn
作者简介:  齐美美(1995-),女,硕士研究生,研究方向为沸石分子筛的合成及其工业应用,qimeimei99@163.com
引用本文:    
齐美美, 李孝国, 常洋, 赵成浩, 张安峰, 侯章贵, 郭新闻. 核壳结构Pt@ZSM-5@S-1分子筛用于甲苯甲醇烷基化制对二甲苯的研究[J]. 现代化工, 2020, 40(9): 131-135,141.
QI Mei-mei, LI Xiao-guo, CHANG Yang, ZHAO Cheng-hao, ZHANG An-feng, HOU Zhang-gui, GUO Xin-wen. Core-shell Pt@ZSM-5@S-1 molecular sieve for alkylation of toluene and methanol to make p-xylene. Modern Chemical Industry, 2020, 40(9): 131-135,141.
链接本文:  
https://www.xdhg.com.cn/CN/10.16606/j.cnki.issn0253-4320.2020.09.027  或          https://www.xdhg.com.cn/CN/Y2020/V40/I9/131
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