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Catalytic properties and acidity of ZSM-12 zeolite with different textures

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Title: Catalytic properties and acidity of ZSM-12 zeolite with different textures
Authors: Dimitrov, L.1 dimitrov@ufscar.br, Mihaylov, M.2, Hadjiivanov, K.2, Mavrodinova, V.3
Source: Microporous & Mesoporous Materials. Sep2011, Vol. 143 Issue 2/3, p291-301. 11p.
Subjects: Zeolites, Catalysis, X-ray diffraction, Acidity function, Nuclear magnetic resonance, Toluene, Nitrogen absorption & adsorption, Materials texture
Abstract: Abstract: Three MTW (H-ZSM-12) zeolite samples were synthesized by (i) direct hydrothermal method, (ii) desilication of the hydrothermal obtained product and (iii) mesostructuration of zeolite ZSM-12 seeds in the presence of hexadecyltrimethylammonium bromide. The samples were characterized by XRD, nitrogen adsorption isotherms, SEM, 27Al-MAS NMR and FTIR spectroscopy. Their acidity was evaluated by FTIR spectroscopy of CO probe molecule adsorbed at 100K. The IR results were correlated with the fraction of aluminum in tetrahedral positions found by 27Al-MAS NMR as well as with the catalytic behavior toward the transformation of the test molecule of 1,2,4-trimethylbenzene. It was concluded that the density of the strong Brønsted acid sites, rather than the textural properties, are the dominating factor governing the catalytic performance of the samples in the target reaction. [Copyright &y& Elsevier]
Copyright of Microporous & Mesoporous Materials is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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DbLabel: Engineering Source
An: 61178383
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  Data: Catalytic properties and acidity of ZSM-12 zeolite with different textures
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  Data: <searchLink fieldCode="AR" term="%22Dimitrov%2C+L%2E%22">Dimitrov, L.</searchLink><relatesTo>1</relatesTo><i> dimitrov@ufscar.br</i><br /><searchLink fieldCode="AR" term="%22Mihaylov%2C+M%2E%22">Mihaylov, M.</searchLink><relatesTo>2</relatesTo><br /><searchLink fieldCode="AR" term="%22Hadjiivanov%2C+K%2E%22">Hadjiivanov, K.</searchLink><relatesTo>2</relatesTo><br /><searchLink fieldCode="AR" term="%22Mavrodinova%2C+V%2E%22">Mavrodinova, V.</searchLink><relatesTo>3</relatesTo>
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  Data: <searchLink fieldCode="JN" term="%22Microporous+%26+Mesoporous+Materials%22">Microporous & Mesoporous Materials</searchLink>. Sep2011, Vol. 143 Issue 2/3, p291-301. 11p.
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  Data: <searchLink fieldCode="DE" term="%22Zeolites%22">Zeolites</searchLink><br /><searchLink fieldCode="DE" term="%22Catalysis%22">Catalysis</searchLink><br /><searchLink fieldCode="DE" term="%22X-ray+diffraction%22">X-ray diffraction</searchLink><br /><searchLink fieldCode="DE" term="%22Acidity+function%22">Acidity function</searchLink><br /><searchLink fieldCode="DE" term="%22Nuclear+magnetic+resonance%22">Nuclear magnetic resonance</searchLink><br /><searchLink fieldCode="DE" term="%22Toluene%22">Toluene</searchLink><br /><searchLink fieldCode="DE" term="%22Nitrogen+absorption+%26+adsorption%22">Nitrogen absorption & adsorption</searchLink><br /><searchLink fieldCode="DE" term="%22Materials+texture%22">Materials texture</searchLink>
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  Data: Abstract: Three MTW (H-ZSM-12) zeolite samples were synthesized by (i) direct hydrothermal method, (ii) desilication of the hydrothermal obtained product and (iii) mesostructuration of zeolite ZSM-12 seeds in the presence of hexadecyltrimethylammonium bromide. The samples were characterized by XRD, nitrogen adsorption isotherms, SEM, 27Al-MAS NMR and FTIR spectroscopy. Their acidity was evaluated by FTIR spectroscopy of CO probe molecule adsorbed at 100K. The IR results were correlated with the fraction of aluminum in tetrahedral positions found by 27Al-MAS NMR as well as with the catalytic behavior toward the transformation of the test molecule of 1,2,4-trimethylbenzene. It was concluded that the density of the strong Brønsted acid sites, rather than the textural properties, are the dominating factor governing the catalytic performance of the samples in the target reaction. [Copyright &y& Elsevier]
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  Data: <i>Copyright of Microporous & Mesoporous Materials is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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        Value: 10.1016/j.micromeso.2011.03.009
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      – Code: eng
        Text: English
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        PageCount: 11
        StartPage: 291
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        Type: general
      – SubjectFull: Catalysis
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      – SubjectFull: X-ray diffraction
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      – SubjectFull: Acidity function
        Type: general
      – SubjectFull: Nuclear magnetic resonance
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      – SubjectFull: Toluene
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      – SubjectFull: Nitrogen absorption & adsorption
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      – SubjectFull: Materials texture
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      – TitleFull: Catalytic properties and acidity of ZSM-12 zeolite with different textures
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              Text: Sep2011
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              Y: 2011
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