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Importance of hydrogen for low-temperature detemplation of high-silica MFI zeolite crystals
Lang, Lin1; Zhao, Shuheng1,2; Jiang, Junfei1,2; Yang, Wenshen1; Yin, Xiuli1
2016-11-15
Source PublicationMICROPOROUS AND MESOPOROUS MATERIALS
Volume235Pages:143-150
AbstractMany attempts have been made for template removal from inorganic porous materials at mild temperature (below 350 degrees C), because high-temperature calcination is attributed as the trigger of the framework damages. In this study, a new two-step method, coupling by low-temperature hydrocracking and oxidation, is proposed for efficient removal of the organic templates in high-silica MFI zeolite crystals of different size at a mild temperature (300 degrees C). With this approach, unlike in conventional calcination above 400 degrees C, the pristine zeolite framework is preserved and no coke-like residues are formed, consistently verified by NMR, TGA, and Raman spectra. The reason for this phenomenon is proved as a special propyl-radical-mechanism in H-2 atmosphere, indicated by GC measurement and analysis online. This provides an alternative option for the low-temperature detemplation of high-silica microporous materials. (C) 2016 Elsevier Inc. All rights reserved.
SubtypeArticle
KeywordMfi Zeolites Template Removal Tetrapropylammonium (Tpa(+)) Low-temperature Hydrocracking Two-step Detemplation
WOS HeadingsScience & Technology ; Physical Sciences ; Technology
DOI10.1016/j.micromeso.2016.07.044
WOS Subject ExtendedChemistry ; Science & Technology - Other Topics ; Materials Science
WOS KeywordTEMPLATE-REMOVAL ; THERMAL-DECOMPOSITION ; MICROPOROUS MATERIALS ; MOLECULAR-SIEVE ; SINGLE-CRYSTALS ; ZSM-5 ; MEMBRANES ; TETRAPROPYLAMMONIUM ; HYDROCRACKING ; CALCINATION
Indexed BySCI
Language英语
Funding OrganizationNatural Science Foundation of China(51202245 ; Guangdong Natural Science Foundation(S201301001489610 ; Youth Innovation Promotion Association, CAS ; 51106165) ; 251007006000000)
WOS SubjectChemistry, Applied ; Chemistry, Physical ; Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary
WOS IDWOS:000383937100015
Citation statistics
Cited Times:1[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.giec.ac.cn/handle/344007/11913
Collection中国科学院广州能源研究所
Affiliation1.Chinese Acad Sci, Guangzhou Inst Energy Convers, CAS Key Lab Renewable Energy, Guangdong Key Lab New & Renewable Energy Res & De, Guangzhou 510640, Guangdong, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
First Author AffilicationGuangZhou Institute of Energy Conversion,Chinese Academy of Sciences
Recommended Citation
GB/T 7714
Lang, Lin,Zhao, Shuheng,Jiang, Junfei,et al. Importance of hydrogen for low-temperature detemplation of high-silica MFI zeolite crystals[J]. MICROPOROUS AND MESOPOROUS MATERIALS,2016,235:143-150.
APA Lang, Lin,Zhao, Shuheng,Jiang, Junfei,Yang, Wenshen,&Yin, Xiuli.(2016).Importance of hydrogen for low-temperature detemplation of high-silica MFI zeolite crystals.MICROPOROUS AND MESOPOROUS MATERIALS,235,143-150.
MLA Lang, Lin,et al."Importance of hydrogen for low-temperature detemplation of high-silica MFI zeolite crystals".MICROPOROUS AND MESOPOROUS MATERIALS 235(2016):143-150.
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