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Nano-crystalline ceria catalysts for the abatement of polycyclic aromatic hydrocarbons

Garcia, Tomas, Solsona, Benjamin Espriu and Taylor, Stuart Hamilton 2005. Nano-crystalline ceria catalysts for the abatement of polycyclic aromatic hydrocarbons. Catalysis Letters 105 (3-4) , pp. 183-189. 10.1007/s10562-005-8689-2

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Abstract

Nano-crystalline cerium oxide catalysts have been prepared by precipitation and evaluated for the total catalytic oxidation of naphthalene, which is a polycyclic aromatic hydrocarbon (PAH). Ceria synthesised by precipitation with urea was the most active catalyst for oxidation of naphthalene to carbon dioxide. The urea precipitated CeO2 demonstrated over 90 naphthalene conversion to carbon dioxide at 175°C (100 ppm naphthalene, GHSV=25,000 h-1), whilst ceria precipitated via a carbonate only gave 90 conversion at 275°C. Comparison with known high activity total oxidation catalysts, Mn2O3 and 0.5 Pt/γ-Al2O 3, showed that the urea precipitated CeO2 was a more effective catalyst for naphthalene total oxidation. At temperatures below those required to achieve catalytic activity the adsorption capacity of urea precipitated ceria for naphthalene was considerably greater than any of the other catalysts examined. The high adsorption capacity of the material provides the advantage that it can be used as a combined catalyst and adsorbent to remove PAHs from waste streams. © 2005 Springer Science+Business Media, Inc.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Chemistry
Cardiff Catalysis Institute (CCI)
Subjects: Q Science > QD Chemistry
Uncontrolled Keywords: Adsorption; Carbon dioxide; Cerium compounds; Nanostructured materials; Naphthalene; Oxidation; Polycyclic aromatic hydrocarbons; Precipitation (chemical), Catalytic oxidation; Ceria catalysts; Waste streams, Catalysts
Additional Information: cited By (since 1996) 21
Publisher: Kluwer Academic Publishers
ISSN: 1011-372X
Last Modified: 03 Nov 2017 01:38
URI: http://orca.cf.ac.uk/id/eprint/10275

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