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Physico-Chemical Characterization and Catalytic Properties of Copper-Doped Alumina-Pillared Montmorillonites

Published online by Cambridge University Press:  28 February 2024

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

Cu-doped alumina-pillared montmorillonite samples have been prepared and characterized with X-ray diffraction (XRD), Brunauer-Emmett-Teller (BET), electron spin resonance (ESR) and inductive coupled plasma atomic emission spectroscopy (ICP AES) techniques. The results show that the catalysts are porous materials with copper species located in the interlayer, present either as isolated Cu2+ ions anchored at alumina pillars or as patches of amorphous CuO. Catalytic tests with hydroxylation of phenol show that the clay samples possess significant activity for dihydroxybenzene (DHB) formation, comparable with the reference TS-1 catalyst. Experiments with changing the substrate dosing indicate that adsorption and activation of phenol molecules is a necessary condition for the reaction to occur.

Keywords

AluminaCopperCopper CatalystMontmorillonitePhenol HydroxylationPillared Clay
Type
Research Article
Information
Clays and Clay Minerals , Volume 46 , Issue 1 , February 1998 , pp. 98 - 102
Copyright
Copyright © 1998, The Clay Minerals Society

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