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Catalytic oxidation of VOCs and CO by ozone over alumina supported cobalt oxide

Paper ID Volume ID Publish Year Pages File Format Full-Text
44255 46011 2006 6 PDF Available
Title
Catalytic oxidation of VOCs and CO by ozone over alumina supported cobalt oxide
Abstract

An alumina-supported cobalt oxide system with overstoichiometric oxygen (CoOx/Al2O3) was investigated with respect to heterogeneous catalytic decomposition of ozone, complete oxidation of volatile organic compounds (VOCs) and oxidation of CO. The experiments were performed in the temperature range of −45 to 250 °C in an isothermal plug-flow reactor. The characterization of the CoOx/Al2O3 catalyst was performed by chemical analysis, XPS, XRD, IR techniques, magnetic and adsorption measurements.A very high activity of the catalyst towards ozone decomposition was observed even at temperatures below −40 °C, the catalyst remaining active for a long time. The activity of the catalyst with respect to complete oxidation of VOCs and oxidation of carbon monoxide was studied in presence of different oxidizing agents (ozone or oxygen). A significant increase in the catalytic activity and decrease in the reaction temperature was observed using ozone as an oxidant.Two main reasons for this behaviour were found: (i) the high content of active and mobile oxygen obtained during the synthesis on the catalyst surface; (ii) the catalytically active complex of O−[Co4+], formed during the reaction of ozone decomposition and able to oxidize VOCs at room temperature.

Keywords
Cobalt oxide; Ozone decomposition; CO oxidation; VOCs complete oxidation
First Page Preview
Catalytic oxidation of VOCs and CO by ozone over alumina supported cobalt oxide
Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis A: General - Volume 298, 10 January 2006, Pages 109–114
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis