Citation: CHEN Yan-Hong, CUI Hong-Xia, HAN Dong-Min, ZHANG Qiang, LI Chun-Yi. Organic-Free and Seeded-Directed Synthesis of ZSM-5 Zeolite by Dry-Gel Conversion Method[J]. Chinese Journal of Inorganic Chemistry, ;2018, 34(3): 461-466. doi: 10.11862/CJIC.2018.049 shu

Organic-Free and Seeded-Directed Synthesis of ZSM-5 Zeolite by Dry-Gel Conversion Method

1.
Sheng Li College, China University of Petroleum, Dongying, Shandong 257061, China
2.
State Key Laboratory of Heavy Oil Processing, China University of Petroleum, Qingdao, Shandong 266580, China

Corresponding author: CHEN Yan-Hong, chenning995@163.com
Received Date: 1 September 2017
Revised Date: 5 November 2017

Figures(7)

The synthesis of ZSM-5 zeolite by seeded dry-gel conversion method using water glass as a cheap silica source was studied. The products were characterized using XRD, SEM, TEM, FTIR, N₂ adsorption-desorption and NH₃-TPD. The crystallization process of ZSM-5 zeolite was investigated in detail. The results show that ZSM-5 zeolite can be synthesized when the ratio of n_SiO₂/n_Al₂O₃ is 30~70, n_Na₂O/n_SiO₂ is 0.12~0.2, even in the absence of external bulk water. The added of external bulk water can accelerate the crystallization speed. Compared with the products synthesized by conventional hydrothermal synthesis method, the dry-gel synthesized ZSM-5 zeolite show much smaller crystal size and much shorter crystallization time.
- ZSM-5,
- template-free,
- seed dry-gel conversion method,
- water glass,
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沈阳化工大学材料科学与工程学院沈阳 110142