Seeds Promoted Interzeolite Transformation of USY and Fumed Silica to Long-Lifetime SSZ-13 Catalysts in Methanol-to-Olefins Reaction via a Grinding Route

doi:10.1134/S0965544122070246

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	Seeds Promoted Interzeolite Transformation of USY and Fumed Silica to Long-Lifetime SSZ-13 Catalysts in Methanol-to-Olefins Reaction via a Grinding Route
	Hao, Zongyi; Niu, Li; Long, Xuefeng; Li, Hongwei; Wang, Dongliang; Ji, Dong; Zhao, Xinhong
刊名	Petroleum Chemistry
	2022
关键词	Ammonia Crystals Grinding (machining) Methanol Minerals Olefins Silica Zeolites Fumed silicas Grinding methods Interzeolite conversion Long lifetime Methanol to olefin Methanol-to-olefin reaction Olefin reactions Seed crystal SSZ-13 ]+ catalyst
ISSN号	0965-5441
DOI	10.1134/S0965544122070246
英文摘要	Abstract: Two different seed crystals (K–CHA and nano-scaled SAPO-34) were used to promote the rapid interzeolite conversion of USY and fumed silica to pure SSZ-13 zeolite phase via a grinding route. The results show that both seeds can shorten the crystallization time of SSZ-13 zeolite to 24h, which is much shorter than the syntheses in the absence of seeds. The phase purity, morphology, textural parameters, elemental compositions and acid properties of two typical H–SSZ-13 samples with seeds were analyzed by XRD, SEM, N2 physisorption, EDS and NH3–TPD techniques in detail, and compared with the sample without seeds and a reference sample. The results indicate that the introduction of seeds can effectively modify the acid properties of H–SSZ-13, especially their medium strong acid sites. The methanol-to-olefins (MTO) reaction was employed as a probe to evaluate the catalytic stability of above four H–SSZ-13 catalysts. The results reveal that the catalytic lifetime of the two catalysts using seeds is much longer than that of the one without seeds and the reference sample H–SSZ-13–RS. It was speculated that the appropriate concentration of medium strong acid sites may play a pivotal role in prolonging their catalytic lifetime. Here our findings may throw light on the rational design of long-lifetime H-SSZ-13 catalysts in the MTO reaction. [Figure not available: see fulltext.]. © 2022, Pleiades Publishing, Ltd.
WOS研究方向	Chemistry ; Energy & Fuels ; Engineering
语种	英语
出版者	Pleiades journals
WOS记录号	WOS:000847628300003
内容类型	期刊论文
源URL	[http://ir.lut.edu.cn/handle/2XXMBERH/159762]
专题	石油化工学院
作者单位	School of Petrochemical Technology, Lanzhou University of Technology, Key Laboratory of Low Carbon Energy and Chemical Engineering of Gansu Province, Lanzhou; 730050, China
推荐引用方式 GB/T 7714	Hao, Zongyi,Niu, Li,Long, Xuefeng,et al. Seeds Promoted Interzeolite Transformation of USY and Fumed Silica to Long-Lifetime SSZ-13 Catalysts in Methanol-to-Olefins Reaction via a Grinding Route[J]. Petroleum Chemistry,2022.
APA	Hao, Zongyi.,Niu, Li.,Long, Xuefeng.,Li, Hongwei.,Wang, Dongliang.,...&Zhao, Xinhong.(2022).Seeds Promoted Interzeolite Transformation of USY and Fumed Silica to Long-Lifetime SSZ-13 Catalysts in Methanol-to-Olefins Reaction via a Grinding Route.Petroleum Chemistry.
MLA	Hao, Zongyi,et al."Seeds Promoted Interzeolite Transformation of USY and Fumed Silica to Long-Lifetime SSZ-13 Catalysts in Methanol-to-Olefins Reaction via a Grinding Route".Petroleum Chemistry (2022).