Influence of synthesis parameters on the crystallinity and Si/Al ratio of NaY zeolite synthesized from kaolin

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	Influence of synthesis parameters on the crystallinity and Si/Al ratio of NaY zeolite synthesized from kaolin
	Li Qiang 1,2; Zhang Ying 1,3; Cao Zhijun 1; Gao Wei 1; Cui Lishan 1,3
刊名	PETROLEUM SCIENCE
	2010-09-01
卷号	7 期号:3 页码:403-409
关键词	Kaolin NaY zeolite high-silica seed solution aging time crystallinity
ISSN号	1672-5107
通讯作者	Zhang, Y
英文摘要	Well-crystallized high-silica NaY zeolites (Si/Al>2.5) were prepared from a reaction mixture consisting of metakaolin, sodium silicate solution and seed solution via optimization of the mixture composition and reaction conditions The transformation from kaolin to high-silica NaY zeolite was confirmed by XRD, SEM and IR techniques Subsequently, the influence of synthesis parameters, i.e initial SiO(2)/Al(2)O(3), initial Na(2)O/SiO(2), initial H(2)O/SiO(2), aging time of the seed solution, crystallization temperature and crystallization time, on the NaY growth was investigated in terms of crystallinity and Si/Al ratio The results showed that the effects of initial SiO(2)/Al(2)O(3), initial Na(2)O/SiO(2) and initial H(2)O//SiO(2), on the crystallinity and Si/Al ratio of NaY zeolite are similar to those observed in the conventional syntheses of NaY zeolites only using sodium silicate solution as silicon source. However, due to the use of metakaolin as the main silicon and aluminum sources in the present study, a long crystallization induction period of 20 h was achieved, which can be attributed to the dissolution of metakaolin In addition, different from the conventional syntheses of zeolite NaY, pure NaY zeolites (i.e without NaP zeolite impurity) were still obtained even at 120 degrees C because of the use of a large quantity of seed solution (23 wt%) in the reaction mixture As the aging time of the seed solution increased from 3.5 h to 22 h, the relative crystallinity of the NaY zeolite first increased sharply and then reached a plateau, while the Si/Al ratio first increased rapidly up to a maximum value of 2.75 corresponding to an aging time of 6 5 h, and then decreased sharply with the aging time.
WOS标题词	Science & Technology ; Technology
类目[WOS]	Energy & Fuels ; Engineering, Petroleum
研究领域[WOS]	Energy & Fuels ; Engineering
收录类别	SCI
语种	英语
WOS记录号	WOS:000280434900015
公开日期	2013-11-13
内容类型	期刊论文
版本	出版稿
源URL	[http://ir.ipe.ac.cn/handle/122111/5722]
专题	过程工程研究所_多相复杂系统国家重点实验室
作者单位	1.China Univ Petr, Dept Mat Sci & Technol, Beijing 102249, Peoples R China 2.Chinese Acad Sci, Inst Proc Engn, Natl Key Lab Multiphase Complex Syst, Beijing 100190, Peoples R China 3.China Univ Petr, Microstruct Lab Energy Mat, Beijing 102249, Peoples R China
推荐引用方式 GB/T 7714	Li Qiang,Zhang Ying,Cao Zhijun,et al. Influence of synthesis parameters on the crystallinity and Si/Al ratio of NaY zeolite synthesized from kaolin[J]. PETROLEUM SCIENCE,2010,7(3):403-409.
APA	Li Qiang,Zhang Ying,Cao Zhijun,Gao Wei,&Cui Lishan.(2010).Influence of synthesis parameters on the crystallinity and Si/Al ratio of NaY zeolite synthesized from kaolin.PETROLEUM SCIENCE,7(3),403-409.
MLA	Li Qiang,et al."Influence of synthesis parameters on the crystallinity and Si/Al ratio of NaY zeolite synthesized from kaolin".PETROLEUM SCIENCE 7.3(2010):403-409.