Oxidation of Toluene by Ozone over Surface-Modified γ-Al2O3: Effect of Ag Addition

Malladi, Sairam K and Shashidhar, Thatikonda and Subrahmanyam, Challapalli and et al, . (2022) Oxidation of Toluene by Ozone over Surface-Modified γ-Al2O3: Effect of Ag Addition. Catalysts, 12 (4). pp. 1-12. ISSN 2073-4344

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Abstract

In this study, the ability of ozone to oxidise toluene present in low levels into CO and CO2 was studied. The catalytic ozonation of toluene was carried out in a micro‐fixed bed reactor. The oxidation was done in two steps: toluene adsorption on the catalyst followed by sequential ozone desorption. Toluene breakdown by ozone at low temperature and atmospheric pressure was achieved using γ‐Al2O3 supported transition metal oxides impregnated with a reduced noble metal. The catalyst Ag–CoOx/γ‐Al2O3 efficiently oxidised and transformed toluene into products (52.4% COx yield). This catalyst has a high surface area, more acidic sites, and lattice oxygens for better toluene oxidation. The addition of Ag to the CoOx/γ‐Al2O3 catalyst surface improved toluene ad-sorption on the catalyst surface, resulting in improved product yield, selectivity, and carbon bal-ance. © 2022 by the authors. Licensee MDPI, Basel, Switzerland.

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