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Copper-doped alumina-pillared montmorillonites as catalysts for oxidation of toluene and xylenes with hydrogen peroxide

Published online by Cambridge University Press:  09 July 2018

K. Bahranowski ,
M. Gąsior ,
A. Kielski ,
J. Podobiński ,
E. M. Serwicka ,
L. A. Vartikian  and
K. Wodnicka
K. Bahranowski
Affiliation:
Faculty of Geology, Geophysics and Environmental Protection, Academy of Mining and Metallurgy, al. Mickiewicza 30, 30-059 Kraków, Poland
M. Gąsior
Affiliation:
Institute of Catalysis and Surface Chemistry, Polish Academy of Sciences, 30-239 Kraków, ul. Niezapominajek 1, Poland
A. Kielski
Affiliation:
Faculty of Material Chemistry and Ceramics, Academy of Mining and Metallurgy, al. Mickiewicza 30, 30-059 Kraków, Poland
J. Podobiński
Affiliation:
Institute of Catalysis and Surface Chemistry, Polish Academy of Sciences, 30-239 Kraków, ul. Niezapominajek 1, Poland
E. M. Serwicka*
Affiliation:
Institute of Catalysis and Surface Chemistry, Polish Academy of Sciences, 30-239 Kraków, ul. Niezapominajek 1, Poland
L. A. Vartikian
Affiliation:
Institute of Catalysis and Surface Chemistry, Polish Academy of Sciences, 30-239 Kraków, ul. Niezapominajek 1, Poland
K. Wodnicka
Affiliation:
Faculty of Material Chemistry and Ceramics, Academy of Mining and Metallurgy, al. Mickiewicza 30, 30-059 Kraków, Poland
*
1Author for correspondence
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Abstract

Catalytic properties of Cu-doped alumina-pillared montmorillonite samples have been tested in the liquid phase oxidation of toluene, o-, m-, and p-xylene with hydrogen peroxide. The results show that the clay samples possess significant activity for both the oxidation of methyl groups and hydroxylation of the aromatic ring. Physicochemical characterization of the catalysts using XRD, BET, ESR and ICP-AES techniques show that they are porous materials with Cu species located in the interlayer, present either as isolated Cu2+ ions anchored at alumina pillars or as patches of amorphous CuO. The dependence of the overall yields on the amount of Cu dopant is discussed and explained in terms of the catalyst structural properties.

Type
Research Article
Information
Clay Minerals , Volume 34 , Issue 1 , March 1999 , pp. 79 - 87
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 1999

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Footnotes

2

Permanent address: Institute of Chemical Physics, Armenian Academy of Sciences, 375044 Erevan, Sevak str. 5/2, Armenia.

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