Mesoporogen-Free Synthesis of High-Silica Hierarchically Structured ZSM-5 Zeolites and their Superior Performance for the Methanol-to-Propylene Reaction

doi:10.1002/ejic.201800926

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	Mesoporogen-Free Synthesis of High-Silica Hierarchically Structured ZSM-5 Zeolites and their Superior Performance for the Methanol-to-Propylene Reaction
	Guo, Hangle; Ge, Tongguang; Lv, Jian; Du, Changlin; Zhou, Jian; Liu, Zhicheng; Hua, Zile
	2019-01-10
Source Publication	EUROPEAN JOURNAL OF INORGANIC CHEMISTRY
ISSN	1434-1948
Issue	1 Pages:51
Subtype	Article
Abstract	A series of hierarchically structured ZSM-5 zeolites (ZSM-5 HSZs) with a Si/Al ratio of about 200 have been successfully synthesized in the absence of additional mesoporous agents. XRD, N-2 sorption isotherms, SEM, TEM and NH3-TPD results showed that the obtained HSZs materials possess high crystallinity, interconnected micro/mesoporous structures and similar total acid amounts. Meanwhile, in the methanol-to-propylene (MTP) reaction, compared to the microporous counterpart, all synthesized ZSM-5 HSZs demonstrated superior performance benefitting from their hierarchical porous structures. Interestingly, Al-27 MAS NMR and Py-FTIR results confirmed the inter-transformation of framework and extra-framework Al species with the extension of materials crystallization duration and consequently the variation of materials surface acidity. As a result, the optimized catalyst achieved the highest initial propylene selectivity of 54.4 % and the longest catalyst lifetime (t(90)) of 175 h under the weight hourly space velocity (WHSV) of 1.0 g g(-1) h(-1). Moreover, a new "in situ alkali etching-hydrothermal restoring" mechanism has been proposed to elucidate the structural evolution of here reported high-silica ZSM-5 HSZs during the synthesis.
Keyword	Zeolites Mesoporous materials Microporous materials Acidity Propylene selectivity
DOI	10.1002/ejic.201800926
Language	英语
WOS Research Area	Chemistry
Publisher	WILEY-V C H VERLAG GMBH
Citation statistics	Cited Times:8[WOS] [WOS Record] [Related Records in WOS]
Document Type	期刊论文
Identifier	http://ir.sic.ac.cn/handle/331005/27400
Collection	中国科学院上海硅酸盐研究所
Recommended Citation GB/T 7714	Guo, Hangle,Ge, Tongguang,Lv, Jian,et al. Mesoporogen-Free Synthesis of High-Silica Hierarchically Structured ZSM-5 Zeolites and their Superior Performance for the Methanol-to-Propylene Reaction[J]. EUROPEAN JOURNAL OF INORGANIC CHEMISTRY,2019(1):51.
APA	Guo, Hangle.,Ge, Tongguang.,Lv, Jian.,Du, Changlin.,Zhou, Jian.,...&Hua, Zile.(2019).Mesoporogen-Free Synthesis of High-Silica Hierarchically Structured ZSM-5 Zeolites and their Superior Performance for the Methanol-to-Propylene Reaction.EUROPEAN JOURNAL OF INORGANIC CHEMISTRY(1),51.
MLA	Guo, Hangle,et al."Mesoporogen-Free Synthesis of High-Silica Hierarchically Structured ZSM-5 Zeolites and their Superior Performance for the Methanol-to-Propylene Reaction".EUROPEAN JOURNAL OF INORGANIC CHEMISTRY .1(2019):51.

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