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Catalytic combustion of dilute acetone over Cu-doped ceria catalysts

Catalytic combustion of dilute acetone over Cu-doped ceria catalysts
Catalytic combustion of dilute acetone over Cu-doped ceria catalysts
CuxCe1?xOy (x = 0.06, 0.13, and 0.23) were prepared by a solution combustion route using glycine as the fuel and tested for the catalytic combustion of dilute acetone in air. The structural characteristics of the catalysts were investigated by specific surface area, X-ray diffraction (XRD), scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS), and temperature-programmed reduction (TPR) techniques. The results reveal that the state of the CuO depends on the Cu/Ce molar ratio in the catalyst, which strongly influences the redox behavior and the catalytic activity of the sample. Among the three catalysts, Cu0.13Ce0.87Oy was found to be the most active in the catalytic combustion of acetone. The pulse reaction of pure acetone in the absence of O2 over the Cu0.13Ce0.87Oy catalyst indicated the participation of lattice oxygen from the catalyst in the acetone combustion. Furthermore, the effect of the acetone concentration and the gas hourly space velocity (GHSV) on the catalytic behavior of the catalyst was examined. The stability of the Cu0.13Ce0.87Oy catalyst for acetone combustion was also investigated and an obvious deactivation was observed under the reactant stream for 35 h at 260 °C. XRD analysis of the deactivated catalyst showed that the formation of bulk CuO was responsible for the deactivation of the catalyst.
catalytic combustion, acetone, CuxCe1?xOy, lattice oxygen
1385-8947
583-590
Hu, C.Q.
091e749d-3892-4be7-9b9f-26b223f27a98
Zhu, Q.S.
aa90bc46-f7d5-40d6-9505-21028680800f
Jiang, Zheng
bcf19e78-f5c3-48e6-802b-fe77bd12deab
Chen, L.
586c0d55-dc72-49c0-a4fa-31df7000ce18
Wu, R.F.
7c45eae8-fd73-438a-b5e5-5c9123d2db13
Hu, C.Q.
091e749d-3892-4be7-9b9f-26b223f27a98
Zhu, Q.S.
aa90bc46-f7d5-40d6-9505-21028680800f
Jiang, Zheng
bcf19e78-f5c3-48e6-802b-fe77bd12deab
Chen, L.
586c0d55-dc72-49c0-a4fa-31df7000ce18
Wu, R.F.
7c45eae8-fd73-438a-b5e5-5c9123d2db13

Hu, C.Q., Zhu, Q.S., Jiang, Zheng, Chen, L. and Wu, R.F. (2009) Catalytic combustion of dilute acetone over Cu-doped ceria catalysts Chemical Engineering Journal, 152, (2-3), pp. 583-590. (doi:10.1016/j.cej.2009.05.033).

Record type: Article

Abstract

CuxCe1?xOy (x = 0.06, 0.13, and 0.23) were prepared by a solution combustion route using glycine as the fuel and tested for the catalytic combustion of dilute acetone in air. The structural characteristics of the catalysts were investigated by specific surface area, X-ray diffraction (XRD), scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS), and temperature-programmed reduction (TPR) techniques. The results reveal that the state of the CuO depends on the Cu/Ce molar ratio in the catalyst, which strongly influences the redox behavior and the catalytic activity of the sample. Among the three catalysts, Cu0.13Ce0.87Oy was found to be the most active in the catalytic combustion of acetone. The pulse reaction of pure acetone in the absence of O2 over the Cu0.13Ce0.87Oy catalyst indicated the participation of lattice oxygen from the catalyst in the acetone combustion. Furthermore, the effect of the acetone concentration and the gas hourly space velocity (GHSV) on the catalytic behavior of the catalyst was examined. The stability of the Cu0.13Ce0.87Oy catalyst for acetone combustion was also investigated and an obvious deactivation was observed under the reactant stream for 35 h at 260 °C. XRD analysis of the deactivated catalyst showed that the formation of bulk CuO was responsible for the deactivation of the catalyst.

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Published date: 15 October 2009
Keywords: catalytic combustion, acetone, CuxCe1?xOy, lattice oxygen
Organisations: Faculty of Engineering and the Environment

Identifiers

Local EPrints ID: 352774
URI: http://eprints.soton.ac.uk/id/eprint/352774
ISSN: 1385-8947
PURE UUID: 7438bbb5-2ee6-49c4-a39b-5413084ef525
ORCID for Zheng Jiang: ORCID iD orcid.org/0000-0002-7972-6175

Catalogue record

Date deposited: 20 May 2013 15:53
Last modified: 18 Jul 2017 04:12

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Contributors

Author: C.Q. Hu
Author: Q.S. Zhu
Author: Zheng Jiang ORCID iD
Author: L. Chen
Author: R.F. Wu

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