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Promoting the activity and selectivity of high surface area Ni-Ce-O mixed oxides by gold deposition for VOC catalytic combustion

Solsona, Benjamín, Garcia, Tomás, Aylón, Elvira, Dejoz, Ana M., Vázquez, Isabel, Agouram, Said, Davies, Thomas Edward and Taylor, Stuart Hamilton 2011. Promoting the activity and selectivity of high surface area Ni-Ce-O mixed oxides by gold deposition for VOC catalytic combustion. Chemical Engineering Journal 175 , pp. 271-278. 10.1016/j.cej.2011.09.104

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Abstract

Gold supported on nickel cerium oxide catalysts (Ni–Ce–O) have been studied for the total oxidation of propane, as a model for hydrocarbon volatile organic compound emission control. High surface area Ni–Ce–O catalysts were synthesized using a very simple evaporation method, where cerium and nickel salts were evaporated in the presence of a mixture of methanol and oxalic acid. Gold catalysts were prepared following a deposition–precipitation method. A very efficient catalyst for the oxidation of propane, in terms of both activity and selectivity, was obtained. This high activity has been related to the high surface area of the catalyst (and therefore to the presence of more active sites available), a high reducibility of Ni-sites and a low strength of the Ni–O bond. Additionally, all the gold catalysts tested are highly selective towards CO2 (close to 100%), in contrast to gold-free catalysts.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Cardiff Catalysis Institute (CCI)
Chemistry
Subjects: Q Science > QD Chemistry
Publisher: Elsevier
ISSN: 1385-8947
Last Modified: 04 Jun 2017 02:52
URI: http://orca.cf.ac.uk/id/eprint/12915

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