Understanding of the dissolution-crystallization fabrication strategy towards macro/microporous ZSM-5 single crystals

doi:10.1039/c8ce01201f

	Understanding of the dissolution-crystallization fabrication strategy towards macro/microporous ZSM-5 single crystals
	Xu, Lei 4; Zhang, Yanfei 1,2,3,4; Zhang, Xiaomin 4; Zhang, Jie 2,4; Li, Peidong 1,2,3,4; Han, Qiao 1,2,3,4; Guo, Hongchen 1,3
刊名	CRYSTENGCOMM
	2018-11-14
卷号	20 期号:42 页码:6786-6794
ISSN号	1466-8033
DOI	10.1039/c8ce01201f
通讯作者	Xu, Lei(leixu@dicp.ac.cn) ; Guo, Hongchen(hongchenguo@dlut.edu.cn)
英文摘要	In this study, detailed investigations about a novel dissolution-crystallization synthetic route for the fabrication of hierarchically macro/microporous ZSM-5 single crystals were conducted. During the fabrication, pre-prepared mesoporous aluminosilicate spheres (MASS) acted not only as raw materials but also as quasi scaffold templates simultaneously to construct additional macropores. Factors like the amount of alkali sodium hydroxide (NaOH), crystallization temperature and Si/Al ratios of MASS could affect the successful fabrication of such hierarchical zeolites via varying either the dissolution behaviors of precursors or the crystallization of zeolite crystals. Generally, only with suitable amounts of alkali NaOH that matched the Si/Al ratios of precursors and at appropriate crystallization temperature could the balance between the dissolution and crystallization of MASS precursors be achieved and thus the intracrystalline macropores be constructed. Owing to the introduction of rich intracrystalline macropores, the diffusional properties of the hierarchical ZSM-5 crystals were significantly enhanced, which has also been well proved through the toluene adsorption experiment with an intelligent gravimetric analyzer. Thus, with a similar Zn-modification, all the three hierarchical samples with different Si/Al ratios exhibited a much longer lifetime and higher aromatics selectivity in the MTA reactions than the conventional microporous sample.
资助项目	National Natural Science Foundation of China[21506202]
WOS关键词	MESOPOROGEN-FREE SYNTHESIS ; HYDROTHERMAL SYNTHESIS ; CATALYTIC PERFORMANCE ; ZEOLITE CATALYSTS ; DILUTE ETHYLENE ; METHANOL ; CONVERSION ; SILICA ; AROMATIZATION ; MECHANISM
WOS研究方向	Chemistry ; Crystallography
语种	英语
出版者	ROYAL SOC CHEMISTRY
WOS记录号	WOS:000448565300012
资助机构	National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China
内容类型	期刊论文
源URL	[http://cas-ir.dicp.ac.cn/handle/321008/166768]
专题	大连化学物理研究所_中国科学院大连化学物理研究所
通讯作者	Xu, Lei; Guo, Hongchen
作者单位	1.Dalian Univ Technol, Sch Chem Engn, Dalian 116023, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 3.Dalian Univ Technol, State Key Lab Fine Chem, Dalian 116023, Peoples R China 4.Chinese Acad Sci, Dalian Inst Chem Phys, Natl Lab Clean Energy, Dalian 116023, Peoples R China
推荐引用方式 GB/T 7714	Xu, Lei,Zhang, Yanfei,Zhang, Xiaomin,et al. Understanding of the dissolution-crystallization fabrication strategy towards macro/microporous ZSM-5 single crystals[J]. CRYSTENGCOMM,2018,20(42):6786-6794.
APA	Xu, Lei.,Zhang, Yanfei.,Zhang, Xiaomin.,Zhang, Jie.,Li, Peidong.,...&Guo, Hongchen.(2018).Understanding of the dissolution-crystallization fabrication strategy towards macro/microporous ZSM-5 single crystals.CRYSTENGCOMM,20(42),6786-6794.
MLA	Xu, Lei,et al."Understanding of the dissolution-crystallization fabrication strategy towards macro/microporous ZSM-5 single crystals".CRYSTENGCOMM 20.42(2018):6786-6794.