Citation: Dawei He, Danhua Yuan, Zhijia Song, Yunpeng Xu, Zhongmin Liu. Eco-friendly synthesis of high silica zeolite Y with choline as green and innocent structure-directing agent[J]. Chinese Journal of Catalysis, ;2019, 40(1): 52-59. doi: 10.1016/S1872-2067(18)63167-5 shu

Eco-friendly synthesis of high silica zeolite Y with choline as green and innocent structure-directing agent

Dawei He ^a,b, ,
Danhua Yuan ^a ,
Zhijia Song ^a,b ,
Yunpeng Xu ^a ,
Zhongmin Liu ^a

a National Engineering Laboratory for Methanol to Olefins, Dalian National Laboratory for Clean Energy, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, Liaoning, China;
b University of Chinese Academy of Sciences, Beijing 100049, China

Received Date: 12 September 2018
Revised Date: 23 September 2018

Fund Project: The work was supported by the National Natural Science Foundation of China (Grant No.21802136).

Zeolite synthesis in contemporary chemical industries is predominantly conducted using organic structure-directing agents (OSDAs), which are chronically hazardous to humans and the environment. It is a growing trend to develop an eco-friendly and nuisanceless OSDA for zeolite synthesis. Herein, choline is employed as a non-toxic and green OSDA to synthesize high silica Y zeolite with SiO₂/Al₂O₃ ratios of 6.5-6.8. The prepared Y zeolite samples exhibited outstanding (hydro)thermal stability at ultrahigh temperature owing to the higher SiO₂/Al₂O₃ ratio. The XRF, SEM, ²⁹Si-NMR and ¹³Na+ results suggested that choline plays a structure-directing role in the synthesis of Y zeolite, while the feed molar fraction of Na⁺ is a crucial determinant for the framework SiO₂/Al₂O₃ ratio and the crystal morphology.
- Zeolite synthesis,
- FAU zeolite,
- High silica,
- Green organic structure-directing agent,
- (Hydro)thermal stability
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