Preparation and characterization of hierarchical USY by post-treatment
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- 作者：Ke Qiao ; Linjiao Wei ; Rui Feng ; Zifeng Yan…
- 关键词：USY zeolite ; Mesopore ; Crystallinity ; EDTA ; 2Na ; Citric acid
- 刊名：Applied Petrochemical Research
- 出版年：2015
- 出版时间：December 2015
- 年：2015
- 卷：5
- 期：4
- 页码：313-319
- 全文大小：1,498 KB
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Linjiao Wei (1)
Rui Feng (1)
Zifeng Yan (1)
Zhongdong Zhang (2)
Xionghou Gao (2)
1. State Key Laboratory of Heavy Oil Processing, Key Laboratory of Catalysis, China University of Petroleum, Qingdao, 266580, People鈥檚 Republic of China
2. Lanzhou Petrochemical Research Center, China National Petroleum Corporation, Lanzhou, 730060, People鈥檚 Republic of China - 刊物主题：Catalysis; Industrial Chemistry/Chemical Engineering; Nanochemistry; Energy Technology; Nanotechnology and Microengineering;
- 出版者：Springer Berlin Heidelberg
- ISSN：2190-5533
文摘
Two modifying agents, citric acid and EDTA-2Na, were used to modify USY zeolite to obtain the hierarchical USY with high crystallinity. XRD, N2 isothermal sorption, 27Al and 29Si NMR, and TEM were adopted to characterize the dealumination process in the post-treatment of USY. The results showed that all modified USY have increased surface areas and pore volume due to the removal of non-framework Al species. Besides, framework dealumination occurred in the modification process. USY-EC, which was modified by the combined effects of citric acid and EDTA-2Na, has the highest SiO2/Al2O3 ratio of 19.40 and relatively high crystallinity. Keywords USY zeolite Mesopore Crystallinity EDTA-2Na Citric acid