A fast route for synthesizing nano-sized ZSM-5 aggregates

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	A fast route for synthesizing nano-sized ZSM-5 aggregates
	Pan, Feng1 ; Lu, Xuchen 1,3; Zhu, Qingshan 1; Zhang, Zhimin 1; Yan, Yan 1; Wang, Tizhuang 1; Chen, Shiwei 1,2
刊名	JOURNAL OF MATERIALS CHEMISTRY A
	2014
卷号	2 期号:48 页码:20667-20675
关键词	CRYSTALLIZATION MECHANISM HYDROTHERMAL SYNTHESIS NANOCRYSTALLINE ZSM-5 HIERARCHICAL ZSM-5 NANOSIZED ZSM-5 ZEOLITE MFI TEMPERATURE KAOLIN IDENTIFICATION PRECURSORS
ISSN号	2050-7488
其他题名	J. Mater. Chem. A
中文摘要	Nano-sized ZSM-5 aggregates have been rapidly synthesized from leached metakaolin by solid-like state conversion. The influence of synthesis conditions such as TPA(+)/SiO2, NaOH/SiO2 and SiO2/Al2O3 molar ratios on the final products was investigated. The properties of nano-sized ZSM-5 aggregates were characterized by XRD, SEM, HRTEM, Si-29 and Al-27 MAS NMR, NH3-TPD, TG, N-2 adsorption-desorption and particle size analysis. The results clearly showed that nano-sized ZSM-5 aggregates could be obtained within 2 h via solid-like state conversion. SEM revealed that the obtained ZSM-5 aggregates were irregular spheres that consisted of nano-sized crystallites with 30-50 nm. The crystallization process indicated that the size of flaky raw materials gradually decreased and formed nano-sized particles as time prolonged. Therefore, the transformation mechanism followed the solution mediated mechanism, though only a little water was contained in the system. Compared with the conventional hydrothermal route, the solid-like state conversion not only significantly shortened the crystallization time, but also totally avoided the emission of waste liquids. In addition, for the methanol dehydration reaction, the nano-sized ZSM-5 aggregates obtained by this method showed much better catalytic performance, C2-C4 olefin selectivity and longer lifetime to endure coke deposition than the sample obtained by the hydrothermal route.
英文摘要	Nano-sized ZSM-5 aggregates have been rapidly synthesized from leached metakaolin by solid-like state conversion. The influence of synthesis conditions such as TPA(+)/SiO2, NaOH/SiO2 and SiO2/Al2O3 molar ratios on the final products was investigated. The properties of nano-sized ZSM-5 aggregates were characterized by XRD, SEM, HRTEM, Si-29 and Al-27 MAS NMR, NH3-TPD, TG, N-2 adsorption-desorption and particle size analysis. The results clearly showed that nano-sized ZSM-5 aggregates could be obtained within 2 h via solid-like state conversion. SEM revealed that the obtained ZSM-5 aggregates were irregular spheres that consisted of nano-sized crystallites with 30-50 nm. The crystallization process indicated that the size of flaky raw materials gradually decreased and formed nano-sized particles as time prolonged. Therefore, the transformation mechanism followed the solution mediated mechanism, though only a little water was contained in the system. Compared with the conventional hydrothermal route, the solid-like state conversion not only significantly shortened the crystallization time, but also totally avoided the emission of waste liquids. In addition, for the methanol dehydration reaction, the nano-sized ZSM-5 aggregates obtained by this method showed much better catalytic performance, C2-C4 olefin selectivity and longer lifetime to endure coke deposition than the sample obtained by the hydrothermal route.
WOS标题词	Science & Technology ; Physical Sciences ; Technology
类目[WOS]	Chemistry, Physical ; Energy & Fuels ; Materials Science, Multidisciplinary
研究领域[WOS]	Chemistry ; Energy & Fuels ; Materials Science
关键词[WOS]	CRYSTALLIZATION MECHANISM ; HYDROTHERMAL SYNTHESIS ; NANOCRYSTALLINE ZSM-5 ; HIERARCHICAL ZSM-5 ; NANOSIZED ZSM-5 ; ZEOLITE MFI ; TEMPERATURE ; KAOLIN ; IDENTIFICATION ; PRECURSORS
收录类别	SCI
原文出处	://WOS:000345531200033
语种	英语
WOS记录号	WOS:000345531200033
公开日期	2015-04-01
内容类型	期刊论文
源URL	[http://ir.ipe.ac.cn/handle/122111/11812]
专题	过程工程研究所_研究所（批量导入）
作者单位	1.Chinese Acad Sci, State Key Lab Multiphase Complex Syst, Inst Proc Engn, Beijing 100190, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100039, Peoples R China 3.United Res Ctr Resource & Mat, Wuhai 016000, Peoples R China
推荐引用方式 GB/T 7714	Pan, Feng,Lu, Xuchen,Zhu, Qingshan,et al. A fast route for synthesizing nano-sized ZSM-5 aggregates[J]. JOURNAL OF MATERIALS CHEMISTRY A,2014,2(48):20667-20675.
APA	Pan, Feng.,Lu, Xuchen.,Zhu, Qingshan.,Zhang, Zhimin.,Yan, Yan.,...&Chen, Shiwei.(2014).A fast route for synthesizing nano-sized ZSM-5 aggregates.JOURNAL OF MATERIALS CHEMISTRY A,2(48),20667-20675.
MLA	Pan, Feng,et al."A fast route for synthesizing nano-sized ZSM-5 aggregates".JOURNAL OF MATERIALS CHEMISTRY A 2.48(2014):20667-20675.