DICP OpenIR
Synthesis of mesoporous ZSM-5 catalysts using different mesogenous templates and their application in methanol conversion for enhanced catalyst lifespan
Wang, Quanyi1,5; Xu, Shutao1,2; Chen, Jingrun1,5; Wei, Yingxu1; Li, Jinzhe1; Fan, Dong1,5; Yu, Zhengxi1; Qi, Yue1; He, Yanli1; Xu, Shuliang1; Yuan, Cuiyu1; Zhou, You1,5; Wang, Jinbang1; Zhang, Mozhi1,5; Su, Baolian2,3; Liu, Zhongmin1,4
Source PublicationRSC ADVANCES
2014
DOI10.1039/c4ra02695k
Volume4Issue:41Pages:21479-21491
Indexed BySCI
SubtypeArticle
WOS HeadingsScience & Technology ; Physical Sciences
WOS SubjectChemistry, Multidisciplinary
WOS Research AreaChemistry
WOS KeywordHYPERPOLARIZED XE-129 NMR ; ZEOLITE SINGLE-CRYSTALS ; UNIT-CELL THICKNESS ; MFI ZEOLITE ; HIERARCHICAL ZEOLITES ; MOLECULAR-SIEVES ; POROUS MATERIALS ; HZSM-5 ZEOLITE ; DESILICATION ; PERFORMANCE
AbstractIn this work, two kinds of mesoporous ZSM-5 were synthesized successfully using a hydrothermal methodology by utilizing different soft templates, namely, dimethyl octadecyl [3-(trimethoxysilyl) propyl] ammonium chloride ([(CH3O)(3)SiC3H6N(CH3)(2)C18H37]Cl, TPOAC) and hexadecyl trimethyl ammonium bromide (C16H33(CH3)(3)NBr, CTAB). The obtained mesoporous ZSM-5 samples were compared with conventional ZSM-5, and the effects of different surfactant usages during the synthesis of mesoporous ZSM-5 on the physicochemical and catalytic properties were systematically investigated. Multiple techniques, such as XRD, SEM, N-2 adsorption techniques, HP Xe-129 NMR, Al-27 MAS NMR, Si-29 MAS NMR, and H-1 MAS NMR, were employed for the characterization. Although the synthesized mesoporous ZSM-5 samples had equal surface areas, they presented different relative crystallinities, morphologies, pore-size distributions, micropore-mesopore interconnectivity, framework atom coordination states and acidities. When using these synthesized ZSM-5 samples as catalysts for methanol conversion, the mesoporous ZSM-5 templated with TPOAC exhibited an extremely long catalyst lifespan compared to conventional ZSM-5, while mesoporous ZSM-5 templated with CTAB showed no advantage in prolonging the catalyst lifetime during the reaction. The differences in the catalytic lifespan and the reduction of coke deposition were correlated to the variation of acidity and porosity with the mesopore generation in the ZSM-5 catalysts by the usage of different structure-directing agents. Compared to the mesopore structure-directing agent, CTAB, with the use of TPOAC as the template and part of the Si source, mesoporous ZSM-5 could be synthesized with good mesopore-micropore interconnectivity, which accounted for the improved catalytic performance in the reaction of methanol conversion.
Language英语
WOS IDWOS:000336837100041
Citation statistics
Cited Times:48[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://cas-ir.dicp.ac.cn/handle/321008/145610
Collection中国科学院大连化学物理研究所
Affiliation1.Chinese Acad Sci, Dalian Inst Chem Phys, Dalian Natl Lab Clean Energy, Dalian 116023, Peoples R China
2.Univ Namur FUNDP, Lab Inorgan Mat Chem CMI, B-5000 Namur, Belgium
3.Wuhan Univ Technol, State Key Lab Adv Technol Mat Synth & Proc, Wuhan 430070, Hubei, Peoples R China
4.Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Catalysis, Dalian 116023, Peoples R China
5.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
Recommended Citation
GB/T 7714
Wang, Quanyi,Xu, Shutao,Chen, Jingrun,et al. Synthesis of mesoporous ZSM-5 catalysts using different mesogenous templates and their application in methanol conversion for enhanced catalyst lifespan[J]. RSC ADVANCES,2014,4(41):21479-21491.
APA Wang, Quanyi.,Xu, Shutao.,Chen, Jingrun.,Wei, Yingxu.,Li, Jinzhe.,...&Liu, Zhongmin.(2014).Synthesis of mesoporous ZSM-5 catalysts using different mesogenous templates and their application in methanol conversion for enhanced catalyst lifespan.RSC ADVANCES,4(41),21479-21491.
MLA Wang, Quanyi,et al."Synthesis of mesoporous ZSM-5 catalysts using different mesogenous templates and their application in methanol conversion for enhanced catalyst lifespan".RSC ADVANCES 4.41(2014):21479-21491.
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