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Hierarchical ZSM-11 zeolite prepared by alkaline treatment with mixed solution of NaOH and CTAB: characterization and application for alkylation of benzene with dimethyl ether
Liu, Hui1,2; Xie, Sujuan1; Xin, Wenjie1; Liu, Shenglin1; Xu, Longya1
Source PublicationCATALYSIS SCIENCE & TECHNOLOGY
2016
ISSN2044-4753
DOI10.1039/c5cy01493j
Volume6Issue:5Pages:1328-1342
Indexed BySCI
SubtypeArticle
WOS HeadingsScience & Technology ; Physical Sciences
WOS SubjectChemistry, Physical
WOS Research AreaChemistry
WOS KeywordIMPROVED CATALYTIC PERFORMANCE ; MICRO-MESOPOROUS MATERIALS ; ACID SITES ; NAOH/TETRABUTYLAMINE HYDROXIDE ; DIRECTING AGENT ; LIGHT OLEFINS ; MFI ZEOLITES ; DESILICATION ; ACCESSIBILITY ; RECRYSTALLIZATION
AbstractA facile alkaline treatment with the addition of surfactant cetyltrimethylammonium bromide (CTAB) to prepare hierarchical ZSM-11 zeolite (Z-xat-yCTAB) is presented. The textural and structural properties of Z-xat-yCTAB were characterized by XRD and adsorption and desorption of N-2 and benzene. By virtue of CTAB addition, uniform intracrystalline mesopore distribution centered at ca. 4.2 nm was introduced accompanied by well-protected microporosity. Based on characterization results such as TEM images and BJH curves as well as Si-29 and Al-27 MAS NMR spectra, the composite effects of NaOH and CTAB on mesoporosity production were proposed. Acidity was characterized thoroughly by FTIR of adsorbed pyridine (Py-IR) and pivalonitrile. Accordingly, the ratio and accessibility factor of Bronsted and Lewis acid sites are discussed systematically. In the alkylation of benzene with dimethyl ether, Z-xat-yCTAB series samples exhibited better reaction stability than ZSM-11 samples treated with NaOH solution. The catalytic promotion could be attributed to the dual effects of NaOH and CTAB on the porosity and acidity regulation. Moreover, based on the correlation between the reaction stability and the ratio of Bronsted to Lewis acid concentration with weak-medium strength, measured by Py-IR, it was revealed that the regulation of acidity could play a more important role for better reaction stability. In addition, the physicochemical properties and reaction activity were compared between ZSM-11 samples derived from alkaline treatment with CTAB addition and with tetrapropylammonium bromide (TPABr) addition under the same conditions.
Language英语
WOS IDWOS:000371607600008
PublisherROYAL SOC CHEMISTRY
Citation statistics
Document Type期刊论文
Identifierhttp://cas-ir.dicp.ac.cn/handle/321008/171089
Collection中国科学院大连化学物理研究所
Corresponding AuthorXu, Longya
Affiliation1.Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Catalysis, Dalian 116023, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
Recommended Citation
GB/T 7714
Liu, Hui,Xie, Sujuan,Xin, Wenjie,et al. Hierarchical ZSM-11 zeolite prepared by alkaline treatment with mixed solution of NaOH and CTAB: characterization and application for alkylation of benzene with dimethyl ether[J]. CATALYSIS SCIENCE & TECHNOLOGY,2016,6(5):1328-1342.
APA Liu, Hui,Xie, Sujuan,Xin, Wenjie,Liu, Shenglin,&Xu, Longya.(2016).Hierarchical ZSM-11 zeolite prepared by alkaline treatment with mixed solution of NaOH and CTAB: characterization and application for alkylation of benzene with dimethyl ether.CATALYSIS SCIENCE & TECHNOLOGY,6(5),1328-1342.
MLA Liu, Hui,et al."Hierarchical ZSM-11 zeolite prepared by alkaline treatment with mixed solution of NaOH and CTAB: characterization and application for alkylation of benzene with dimethyl ether".CATALYSIS SCIENCE & TECHNOLOGY 6.5(2016):1328-1342.
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