Interconnected Hierarchical ZSM-5 with Tunable Acidity Prepared by a Dealumination-Realumination Process: A Superior MTP Catalyst

	Interconnected Hierarchical ZSM-5 with Tunable Acidity Prepared by a Dealumination-Realumination Process: A Superior MTP Catalyst
	Guo, Xinwen 3; Li, Junjie 3; Liu, Min 3; Xu, Shutao 1; Wei, Yingxu 1; Liu, Zhongmin 1; Song, Chunshan 2,3
刊名	ACS APPLIED MATERIALS & INTERFACES
	2017-08-09
卷号	9 期号:31 页码:26096-26106
关键词	Al-zoned ZSM-5 enclosed hollow structure distorted tetrahedral Al dealumination-realumination process reinserted Al interconnected mesopore structure MTP
英文摘要	ZSM-5 that uses TPAOH as a template has an Al-rich exterior and defective Si-rich interior; thus, a simple base leaching selectively removed the Si-rich interior while the Al-rich exterior was protected. This catalyst showed no change in stability comparing with parent ZSM-5 during the MTP reaction that was attributed to the enclosed hollow structure and richly acidic outer shell. A preliminary fluorination, however, both removed defective Si-sites and caused distortion in tetrahedral aluminum that made the outer shell susceptible to alkaline treatment. These distorted tetrahedral Al were mostly leached out by NaOH in 1 min. Furthermore, aluminum in the filtrate was slowly redeposited onto the zeolite, serving as external pore-directing agents to control silicon dissolution from the Si-rich interior. This dealumination-realumination alkaline treatment process led to a higher solid yield and a uniform opened-mesopore structure with mesopores around 13 nm in diameter. This material was characterized by SEM, TEM, N-2 adsorption, and mercury porosimetry.In addition, NH3-TPD, OH-IR, Al-27 MAS NMR, and H-1 MAS NMR results demonstrated that the reinserted Al were unlike the framework Al, contributing less to acidity. The dealumination-realumination process, therefore, was also capable of tuning the acidity of the mesoporous ZSM-5. This mesoporous catalyst exhibited a longer lifetime and a higher propylene selectivity than other catalysts with an enclosed mesopore structure.
WOS标题词	Science & Technology ; Technology
类目[WOS]	Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary
研究领域[WOS]	Science & Technology - Other Topics ; Materials Science
关键词[WOS]	METHANOL-TO-HYDROCARBONS ; CONTROLLED DESILICATION ; FRAMEWORK DEFECTS ; ZEOLITE CATALYSTS ; MFI ZEOLITES ; CONVERSION ; H-ZSM-5 ; SELECTIVITY ; ALUMINUM ; MESOPOROSITY
收录类别	SCI
语种	英语
WOS记录号	WOS:000407540400048
内容类型	期刊论文
源URL	[http://cas-ir.dicp.ac.cn/handle/321008/149819]
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
作者单位	1.Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Catalysis, Dalian 116023, Peoples R China 2.Penn State Univ, Dept Energy & Mineral Engn, EMS Energy Inst, PSU DUT Joint Ctr Energy Res, University Pk, PA 16802 USA 3.Dalian Univ Technol, Sch Chem Engn, PSU DUT Joint Ctr Energy Res, State Key Lab Fine Chem, Dalian 116024, Peoples R China
推荐引用方式 GB/T 7714	Guo, Xinwen,Li, Junjie,Liu, Min,et al. Interconnected Hierarchical ZSM-5 with Tunable Acidity Prepared by a Dealumination-Realumination Process: A Superior MTP Catalyst[J]. ACS APPLIED MATERIALS & INTERFACES,2017,9(31):26096-26106.
APA	Guo, Xinwen.,Li, Junjie.,Liu, Min.,Xu, Shutao.,Wei, Yingxu.,...&Song, Chunshan.(2017).Interconnected Hierarchical ZSM-5 with Tunable Acidity Prepared by a Dealumination-Realumination Process: A Superior MTP Catalyst.ACS APPLIED MATERIALS & INTERFACES,9(31),26096-26106.
MLA	Guo, Xinwen,et al."Interconnected Hierarchical ZSM-5 with Tunable Acidity Prepared by a Dealumination-Realumination Process: A Superior MTP Catalyst".ACS APPLIED MATERIALS & INTERFACES 9.31(2017):26096-26106.