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Oxides of copper, ceria promoted copper, manganese and copper manganese on Al2O3 for the combustion of CO, ethyl acetate and ethanol

Larsson, PO and Andersson, Arne LU (2000) In Applied Catalysis B: Environmental 24(3-4). p.175-192
Abstract
Combustion of CO, ethyl acetate and ethanol was studied over CuOx/Al2O3, CuOx-CeO2/Al2O3, CuMn2O4/Al2O3 and Mn2O3/Al2O3 catalysts. It was found that modification of the alumina with ceria before subsequent copper oxide deposition increases the activity for combustion of CO substantially, but the effect of ceria was small on the combustion of ethyl acetate and ethanol, The activity increases with the CuOx loading until crystalline CuO particles are formed, which contribute little to the total active surface, The CuOx-CeO2/Al2O3 catalyst is more active than the CuMn2O4/Al2O3 catalyst for the oxidation of CO but the CuMn2O4/Al2O3 catalyst is more active for the combustion of ethyl acetate and ethanol. Thermal ageing and water vapour in the... (More)
Combustion of CO, ethyl acetate and ethanol was studied over CuOx/Al2O3, CuOx-CeO2/Al2O3, CuMn2O4/Al2O3 and Mn2O3/Al2O3 catalysts. It was found that modification of the alumina with ceria before subsequent copper oxide deposition increases the activity for combustion of CO substantially, but the effect of ceria was small on the combustion of ethyl acetate and ethanol, The activity increases with the CuOx loading until crystalline CuO particles are formed, which contribute little to the total active surface, The CuOx-CeO2/Al2O3 catalyst is more active than the CuMn2O4/Al2O3 catalyst for the oxidation of CO but the CuMn2O4/Al2O3 catalyst is more active for the combustion of ethyl acetate and ethanol. Thermal ageing and water vapour in the feed caused a modest decrease in activity and did not affect the CuOx-CeO2/Al2O3 and CuMn2O4/Al2O3 catalysts differently. In addition, no difference in intermediates formed over the two catalysts was observed. Characterisation with XRD, FT-Raman and TPR indicates that the copper oxide is present as a copper aluminate surface phase on alumina at low loading. At high loading, bulk CuO crystallites are present as well. Modification of the alumina with ceria before the copper oxide deposition gives well dispersed copper oxide species and bulk CuO crystallites associated to the ceria, in addition to the two copper oxide species on the bare alumina. The distribution of copper species depends on the ceria and copper oxide loading. The alumina supported copper manganese oxide and manganese oxide catalysts consist mainly of crystalline CuMn2O4 and Mn2O3, respectively, on Al2O3 (C) 2000 Elsevier Science B.V. All rights reserved. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
copper oxide, ceria, copper manganese oxide, alumina, TPR, Raman, spectroscopy, XRD, CO combustion, ethanol combustion, ethyl acetate, combustion
in
Applied Catalysis B: Environmental
volume
24
issue
3-4
pages
175 - 192
publisher
Elsevier
external identifiers
  • wos:000084906700005
  • scopus:0034615108
ISSN
0926-3373
DOI
10.1016/S0926-3373(99)00104-6
language
English
LU publication?
yes
id
37b8dbda-a67f-4590-9aba-5a45d151869a (old id 3915460)
date added to LUP
2013-07-02 08:37:37
date last changed
2017-07-23 04:44:33
@article{37b8dbda-a67f-4590-9aba-5a45d151869a,
  abstract     = {Combustion of CO, ethyl acetate and ethanol was studied over CuOx/Al2O3, CuOx-CeO2/Al2O3, CuMn2O4/Al2O3 and Mn2O3/Al2O3 catalysts. It was found that modification of the alumina with ceria before subsequent copper oxide deposition increases the activity for combustion of CO substantially, but the effect of ceria was small on the combustion of ethyl acetate and ethanol, The activity increases with the CuOx loading until crystalline CuO particles are formed, which contribute little to the total active surface, The CuOx-CeO2/Al2O3 catalyst is more active than the CuMn2O4/Al2O3 catalyst for the oxidation of CO but the CuMn2O4/Al2O3 catalyst is more active for the combustion of ethyl acetate and ethanol. Thermal ageing and water vapour in the feed caused a modest decrease in activity and did not affect the CuOx-CeO2/Al2O3 and CuMn2O4/Al2O3 catalysts differently. In addition, no difference in intermediates formed over the two catalysts was observed. Characterisation with XRD, FT-Raman and TPR indicates that the copper oxide is present as a copper aluminate surface phase on alumina at low loading. At high loading, bulk CuO crystallites are present as well. Modification of the alumina with ceria before the copper oxide deposition gives well dispersed copper oxide species and bulk CuO crystallites associated to the ceria, in addition to the two copper oxide species on the bare alumina. The distribution of copper species depends on the ceria and copper oxide loading. The alumina supported copper manganese oxide and manganese oxide catalysts consist mainly of crystalline CuMn2O4 and Mn2O3, respectively, on Al2O3 (C) 2000 Elsevier Science B.V. All rights reserved.},
  author       = {Larsson, PO and Andersson, Arne},
  issn         = {0926-3373},
  keyword      = {copper oxide,ceria,copper manganese oxide,alumina,TPR,Raman,spectroscopy,XRD,CO combustion,ethanol combustion,ethyl acetate,combustion},
  language     = {eng},
  number       = {3-4},
  pages        = {175--192},
  publisher    = {Elsevier},
  series       = {Applied Catalysis B: Environmental},
  title        = {Oxides of copper, ceria promoted copper, manganese and copper manganese on Al2O3 for the combustion of CO, ethyl acetate and ethanol},
  url          = {http://dx.doi.org/10.1016/S0926-3373(99)00104-6},
  volume       = {24},
  year         = {2000},
}