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Development of a new model reaction to characterize the weak reactivity of cationic zeolites

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Title: Development of a new model reaction to characterize the weak reactivity of cationic zeolites
Authors: Santos, V.1, Barthelet, K.1 karin.barthelet@ifp.fr, Gener, I.2, Canaff, C.2, Magnoux, P.2
Source: Microporous & Mesoporous Materials. Sep2008, Vol. 114 Issue 1-3, p262-269. 8p.
Subjects: Isomerization, Addition polymerization, Zeolites, Adsorption (Chemistry)
Abstract: Abstract: A new test in liquid phase using dodecen-1 isomerization as a model reaction was developed to characterize the weak reactivity of cationic zeolites. Thanks to it, the NaY weak activity can be characterized in conditions close to those of several industrial adsorption and separation processes (temperature around 150–200°C and in liquid phase). Indeed, characterization by this model reaction of several NaHY prepared from NaY by exchanging some Na+ by protons and of NaY treated by NaOH allows us to attribute the NaY activity to residual Brönsted acid sites and even to estimate their number. Comparison of NaY before and after passivation of its external by TetraEthylOrthoSiloxane (TEOS) deposition enable us to propose that the residual active sites are mainly located at the external surface and/or in the porosity directly connected to this one. [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.)
Database: Engineering Source
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Header DbId: egs
DbLabel: Engineering Source
An: 32736878
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PubType: Academic Journal
PubTypeId: academicJournal
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  Data: <searchLink fieldCode="AR" term="%22Santos%2C+V%2E%22">Santos, V.</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Barthelet%2C+K%2E%22">Barthelet, K.</searchLink><relatesTo>1</relatesTo><i> karin.barthelet@ifp.fr</i><br /><searchLink fieldCode="AR" term="%22Gener%2C+I%2E%22">Gener, I.</searchLink><relatesTo>2</relatesTo><br /><searchLink fieldCode="AR" term="%22Canaff%2C+C%2E%22">Canaff, C.</searchLink><relatesTo>2</relatesTo><br /><searchLink fieldCode="AR" term="%22Magnoux%2C+P%2E%22">Magnoux, P.</searchLink><relatesTo>2</relatesTo>
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  Data: <searchLink fieldCode="JN" term="%22Microporous+%26+Mesoporous+Materials%22">Microporous & Mesoporous Materials</searchLink>. Sep2008, Vol. 114 Issue 1-3, p262-269. 8p.
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  Data: <searchLink fieldCode="DE" term="%22Isomerization%22">Isomerization</searchLink><br /><searchLink fieldCode="DE" term="%22Addition+polymerization%22">Addition polymerization</searchLink><br /><searchLink fieldCode="DE" term="%22Zeolites%22">Zeolites</searchLink><br /><searchLink fieldCode="DE" term="%22Adsorption+%28Chemistry%29%22">Adsorption (Chemistry)</searchLink>
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  Label: Abstract
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  Data: Abstract: A new test in liquid phase using dodecen-1 isomerization as a model reaction was developed to characterize the weak reactivity of cationic zeolites. Thanks to it, the NaY weak activity can be characterized in conditions close to those of several industrial adsorption and separation processes (temperature around 150–200°C and in liquid phase). Indeed, characterization by this model reaction of several NaHY prepared from NaY by exchanging some Na+ by protons and of NaY treated by NaOH allows us to attribute the NaY activity to residual Brönsted acid sites and even to estimate their number. Comparison of NaY before and after passivation of its external by TetraEthylOrthoSiloxane (TEOS) deposition enable us to propose that the residual active sites are mainly located at the external surface and/or in the porosity directly connected to this one. [Copyright &y& Elsevier]
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  Group: Ab
  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.2008.01.012
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        Text: English
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      – SubjectFull: Addition polymerization
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      – SubjectFull: Zeolites
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      – SubjectFull: Adsorption (Chemistry)
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              M: 09
              Text: Sep2008
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