DICP OpenIR
Understanding of the dissolution-crystallization fabrication strategy towards macro/microporous ZSM-5 single crystals
Zhang, Yanfei1,2,3,4; Zhang, Xiaomin3; Zhang, Jie3,4; Li, Peidong1,2,3,4; Han, Qiao1,2,3,4; Xu, Lei3; Guo, Hongchen1,2
Corresponding AuthorXu, Lei(leixu@dicp.ac.cn) ; Guo, Hongchen(hongchenguo@dlut.edu.cn)
Source PublicationCRYSTENGCOMM
2018-11-14
ISSN1466-8033
DOI10.1039/c8ce01201f
Volume20Issue:42Pages:6786-6794
Funding ProjectNational Natural Science Foundation of China[21506202]
Funding OrganizationNational 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
WOS SubjectChemistry, Multidisciplinary ; Crystallography
WOS Research AreaChemistry ; Crystallography
WOS KeywordMESOPOROGEN-FREE SYNTHESIS ; HYDROTHERMAL SYNTHESIS ; CATALYTIC PERFORMANCE ; ZEOLITE CATALYSTS ; DILUTE ETHYLENE ; METHANOL ; CONVERSION ; SILICA ; AROMATIZATION ; MECHANISM
AbstractIn 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.
Language英语
Funding OrganizationNational 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
WOS IDWOS:000448565300012
PublisherROYAL SOC CHEMISTRY
Citation statistics
Document Type期刊论文
Identifierhttp://cas-ir.dicp.ac.cn/handle/321008/166769
Collection中国科学院大连化学物理研究所
Corresponding AuthorXu, Lei; Guo, Hongchen
Affiliation1.Dalian Univ Technol, State Key Lab Fine Chem, Dalian 116023, Peoples R China
2.Dalian Univ Technol, Sch Chem Engn, Dalian 116023, Peoples R China
3.Chinese Acad Sci, Dalian Inst Chem Phys, Natl Lab Clean Energy, Dalian 116023, Peoples R China
4.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
Recommended Citation
GB/T 7714
Zhang, Yanfei,Zhang, Xiaomin,Zhang, Jie,et al. Understanding of the dissolution-crystallization fabrication strategy towards macro/microporous ZSM-5 single crystals[J]. CRYSTENGCOMM,2018,20(42):6786-6794.
APA Zhang, Yanfei.,Zhang, Xiaomin.,Zhang, Jie.,Li, Peidong.,Han, Qiao.,...&Guo, Hongchen.(2018).Understanding of the dissolution-crystallization fabrication strategy towards macro/microporous ZSM-5 single crystals.CRYSTENGCOMM,20(42),6786-6794.
MLA Zhang, Yanfei,et al."Understanding of the dissolution-crystallization fabrication strategy towards macro/microporous ZSM-5 single crystals".CRYSTENGCOMM 20.42(2018):6786-6794.
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