Redox solid catalysts for the selective oxidation of cyclohexane in air
Redox solid catalysts for the selective oxidation of cyclohexane in air
The selective oxidation of cyclohexane to cyclohexanol, cyclohexanone and adipic acid using molecular oxygen as the oxidant and at moderate temperatures (403 K) has been investigated over four different cobalt?containing aluminophosphate (AlPO) molecular sieves. There is a correlation between catalytic activity and the fraction of (framework) Co(II) ions that is first oxidised to Co(III) in air. CoAlPO?36 (pore aperture 6.5 x 7.5 Å) exhibits significant activity for the oxidation of cyclohexane in contrast to CoAlPO?18, which, although it has the highest fraction of oxidisable cobalt, does not show any activity chiefly because of its smaller pores.
coalpo catalysts, cyclohexane oxidation, molecular oxygen, shape-selectivity, exfas, redox
15-23
Sankar, Gopinathan
31dc72ca-310b-407f-9d6c-856dbfb2e2d1
Raja, Robert
74faf442-38a6-4ac1-84f9-b3c039cb392b
Thomas, John Meurig
f1d9bb61-4e2c-4c4b-8115-953d0f3d36bd
October 1998
Sankar, Gopinathan
31dc72ca-310b-407f-9d6c-856dbfb2e2d1
Raja, Robert
74faf442-38a6-4ac1-84f9-b3c039cb392b
Thomas, John Meurig
f1d9bb61-4e2c-4c4b-8115-953d0f3d36bd
Sankar, Gopinathan, Raja, Robert and Thomas, John Meurig
(1998)
Redox solid catalysts for the selective oxidation of cyclohexane in air.
Catalysis Letters, 55 (1), .
(doi:10.1023/A:1019093703743).
Abstract
The selective oxidation of cyclohexane to cyclohexanol, cyclohexanone and adipic acid using molecular oxygen as the oxidant and at moderate temperatures (403 K) has been investigated over four different cobalt?containing aluminophosphate (AlPO) molecular sieves. There is a correlation between catalytic activity and the fraction of (framework) Co(II) ions that is first oxidised to Co(III) in air. CoAlPO?36 (pore aperture 6.5 x 7.5 Å) exhibits significant activity for the oxidation of cyclohexane in contrast to CoAlPO?18, which, although it has the highest fraction of oxidisable cobalt, does not show any activity chiefly because of its smaller pores.
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Published date: October 1998
Keywords:
coalpo catalysts, cyclohexane oxidation, molecular oxygen, shape-selectivity, exfas, redox
Identifiers
Local EPrints ID: 176929
URI: http://eprints.soton.ac.uk/id/eprint/176929
ISSN: 1011-372X
PURE UUID: 8f3c1d69-8a4b-43b6-8159-39efce4349a4
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Date deposited: 14 Mar 2011 11:39
Last modified: 14 Mar 2024 02:51
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Author:
Gopinathan Sankar
Author:
John Meurig Thomas
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