单一微孔模板剂一锅法制备多级结构ZSM-5沸石

doi:10.1016/S1872-2067(14)60263-1

催化学报 ›› 2015, Vol. 36 ›› Issue (6): 866-873.DOI: 10.1016/S1872-2067(14)60263-1

单一微孔模板剂一锅法制备多级结构ZSM-5沸石

葛同广, 华子乐, 贺晓耘, 朱颜, 任文超, 陈立松, 张玲霞, 陈航榕, 林初城, 姚鹤良, 施剑林

中国科学院上海硅酸盐研究所高性能陶瓷和超微结构国家重点实验室, 上海200050

收稿日期:2014-10-30 修回日期:2014-12-10 出版日期:2015-05-21 发布日期:2015-05-21
通讯作者: 华子乐,电话: (021)52412708; 传真: (021)52413122; 电子信箱: huazl@mail.sic.ac.cn;施剑林,电话: (021)52412712; 传真: (021)52413122; 电子信箱: jlshi@mail.sic.ac.cn
基金资助:
国家重点基础研究发展计划(973计划, 2013CB933200); 国家高技术研究发展计划(863计划, 2012AA062703); 国家杰出青年科学基金(51225202); 重质油国家重点实验室开放课题(SKLOP201402003).

One-pot synthesis of hierarchically structured ZSM-5 zeolites using single micropore-template

Tongguang Ge, Zile Hua, Xiaoyun He, Yan Zhu, Wenchao Ren, Lisong Chen, Lingxia Zhang, Hangrong Chen, Chucheng Lin, Heliang Yao, Jianlin Shi

State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, China

Received:2014-10-30 Revised:2014-12-10 Online:2015-05-21 Published:2015-05-21
Supported by:
This work was supported by the National Basic Research Program of China (2013CB933200), the National High Technology Research and Development Program of China (2012AA062703), China National Funds for Distinguished Young Scientists (51225202), and the Opening Projects of State Key Laboratory of Heavy Oil Processing (SKLOP201402003).

摘要/Abstract

摘要：

以微孔模板剂四丙基氢氧化铵为单一模板剂, 采用一种温和的低温水热一锅法工艺, 成功制备出多级结构ZSM-5沸石(HSZs). 与传统的双模板法和后处理法相比, 这种结合了沸石生长与后刻蚀于一体的新方法, 不仅减少了模板剂的用量及二次酸/碱刻蚀、煅烧造成的环境污染, 同时也极大地简化了合成工艺. 利用XRD, N₂吸附, SEM, TEM, XRF, ²⁷Al NMR与NH₃-TPD等测试手段对合成的HSZs进行了全面表征, 并提出了一种"成核/生长-刻蚀/再晶化"的形成机理. 与传统ZSM-5沸石相比, 这种具有均一梭型形貌的HSZs具有高的水热稳定性, 并在三异丙苯催化裂解的探针反应中表现出优异催化性能和较长使用寿命.

关键词: 多级结构沸石, ZSM-5, 单一模板, 碱刻蚀, 催化

Abstract:

An easy one-step hydrothermal process has been developed for the first time for the synthesis of hierarchically structured zeolites (HSZs) using a single micropore template of tetrapropylammonium hydroxide. Compared with conventional constructive dual-templating synthesis and destructive post-demetallation methods, this two-in-one process reduces the mass of porogens required and consequent air pollution by combustion of the template, and simplifies the synthesis. The resultant HSZs were characterized by X-ray diffraction, N₂ adsorption, scanning electron microscopy, transmission electron microscopy, X-ray fluorescence, ²⁷Al nuclear magnetic resonance, and NH₃ temperature programmed desorption. The resultant HSZs with uniform shuttle-type morphology showed high hydrothermal stability and excellent catalytic activity with prolonged life-time in the model reaction of 1,3,5- triisopropylbenzene cracking. A "nucleation/growth-demetallation/recrystallization" mechanism was proposed, which is featured with the integration of zeolite crystallization/growth and basic etching into one hydrothermal process for HSZs production.

Key words: Hierarchically structured zeolite, ZSM-5, Single template, Base etching, Catalysis

葛同广, 华子乐, 贺晓耘, 朱颜, 任文超, 陈立松, 张玲霞, 陈航榕, 林初城, 姚鹤良, 施剑林. 单一微孔模板剂一锅法制备多级结构ZSM-5沸石[J]. 催化学报, 2015, 36(6): 866-873.

Tongguang Ge, Zile Hua, Xiaoyun He, Yan Zhu, Wenchao Ren, Lisong Chen, Lingxia Zhang, Hangrong Chen, Chucheng Lin, Heliang Yao, Jianlin Shi. One-pot synthesis of hierarchically structured ZSM-5 zeolites using single micropore-template[J]. Chinese Journal of Catalysis, 2015, 36(6): 866-873.

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单一微孔模板剂一锅法制备多级结构ZSM-5沸石

One-pot synthesis of hierarchically structured ZSM-5 zeolites using single micropore-template

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