Synthesis of ZSM-5 via organotemplate-free and dry gel conversion method: Investigating the effects of experimental parameters

被引：24

作者：

Chen, Yan-Hong ^{[1
]}

Han, Dong-Min ^{[1
]}

Cui, Hong-Xia ^{[1
]}

Zhang, Qiang ^{[2
]}

机构：

[1] China Univ Petr, Dept Chem Engn, Shengli Coll, Dongying 257100, Shandong, Peoples R China

[2] China Univ Petr, State Key Lab Heavy Oil Proc, Qingdao 266580, Shandong, Peoples R China

来源：

JOURNAL OF SOLID STATE CHEMISTRY | 2019年 / 279卷

关键词：

ZSM-5; zeolite; Dry gel conversion method; Template free; Influence factors; CATALYTIC PERFORMANCE; ACIDIC PROPERTY; ZEOLITE; ROUTE; CRYSTALS; METHANOL; SAPO-34;

D O I：

10.1016/j.jssc.2019.120969

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

ZSM-5 zeolite was successfully synthesized in an organic template-free system by a dry gel conversion (DGC) method. The influence factors, such as crystallization temperature, crystallization time, water content in the autoclave and the SiO2/Al2O3 molar ratio in the dry gel, have been investigated systematically. A series of DGC-ZSM-5 zeolites were characterized by XRD, SEM, XRF, BET and NH3-TPD. The results showed that the high crystallinity of ZSM-5 could be obtained without organic template. The content of water in the autoclave and the SiO2/Al2O3 molar ratio have a significant effect on the crystallinity and purity of DGC-ZSM-5. Furthermore, a possible formation mechanism was proposed based on the investigation of the crystallization process. Compared with the zeolite synthesized by hydrothermal method, the DGC-ZSM-5 zeolite not only exhibits much shorter crystallization time and smaller particle size, but also retains the synthesis gel SiO2/Al2O3 molar ratio in the final materials.

引用

页数：8

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