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Kinetics of the water-gas shift reaction over nanostructured copper-ceria catalysts
Laboratory of Catalysis and Chemical Reaction Engineering, National Institute of Chemistry, Ljubljana, Slovenia.
Laboratory of Catalysis and Chemical Reaction Engineering, National Institute of Chemistry, Ljubljana, Slovenia.
Laboratory of Catalysis and Chemical Reaction Engineering, National Institute of Chemistry, Ljubljana, Slovenia.
2006 (English)In: Applied Catalysis B: Environmental, ISSN 0926-3373, E-ISSN 1873-3883, Vol. 63, no 3-4, 194-200 p.Article in journal (Refereed) Published
Abstract [en]

Water–gas shift reaction was studied over two nanostructured CuxCe1−xO2−y catalysts: a Cu0.1Ce0.9O2−ycatalyst prepared by a sol–gel method and a Cu0.2Ce0.8O2−y catalyst prepared by co-precipitation method. A commercial low temperature water–gas shift CuO–ZnO–Al2O3 catalyst was used as reference. The kinetics was studied in a plug flow micro reactor at an atmospheric pressure in the temperature interval between 298 and 673 K at two different space velocities: 5.000 and 30.000 h−1, respectively. Experimentally estimated activation energy, Eaf, of the forward water–gas shift reaction at CO/H2O = 1/3 was 51 kJ/mol over the Cu0.1Ce0.9O2−y, 34 kJ/mol over the Cu0.2Ce0.8O2−y and 47 kJ/mol over the CuO–ZnO–Al2O3 catalyst. A simple rate expression approximating the water–gas shift process as a single reversible surface reaction was used to fit the experimental data in order to evaluate the rate constants of the forward and backward reactions and of the activation energy for the backward reaction.

Place, publisher, year, edition, pages
2006. Vol. 63, no 3-4, 194-200 p.
Keyword [en]
Catalysis, Kinetics, Water–gas shift, Catalyst, Ceria, Copper, CO, H2, Fuel cell
National Category
Other Chemical Engineering
Research subject
SRA - Transport
Identifiers
URN: urn:nbn:se:kth:diva-87913DOI: 10.1016/j.apcatb.2005.09.019ISI: 000236154300005OAI: oai:DiVA.org:kth-87913DiVA: diva2:502025
Funder
TrenOp, Transport Research Environment with Novel Perspectives
Note
QC 20120224Available from: 2012-02-14 Created: 2012-02-14 Last updated: 2017-12-07Bibliographically approved

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