Volatile organic compounds abatement over copper-based catalysts: Effect of support

• Published in: Inorganica Chimica Acta Vol. 455; pp. 473 - 482
• Main Authors: Konsolakis, M., Carabineiro, S.A.C., Marnellos, G.E., Asad, M.F., Soares, O.S.G.P., Pereira, M.F.R., Órfão, J.J.M., Figueiredo, J.L.
• Format: Journal Article
• Language: English
• Published: Amsterdam Elsevier B.V 30.01.2017; Elsevier Science Ltd
• Subjects: Catalysts; Catalytic converters; CeO2; Cerium oxides; Conversion; Copper; Copper (Cu)-based catalysts; Copper compounds; Ethyl acetate; Ethyl acetate (EtOAc) oxidation; Gadolinium oxides; Gd2O3; La2O3; Lanthanum oxides; Organic compounds; Oxidation; Rare earth compounds; Scanning electron microscopy; Sm2O3; Spectrum analysis; VOCs; Volatile organic compounds; Volatile organic compounds (VOCs); X-ray diffraction; Copper (Cu)-based catalysts; Volatile organic compounds (VOCs); CeO2; La2O3; Ethyl acetate (EtOAc) oxidation; Gd2O3; Sm2O3
• ISSN: 0020-1693; 1873-3255
• DOI: 10.1016/j.ica.2016.07.059

[Display omitted] •Ethyl acetate oxidation was tested over Cu/CeO2, Cu/Gd2O3, Cu/La2O3 and Cu/Sm2O3.•A close correlation between the oxidation performance and redox properties was revealed.•Cu/CeO2 had the best performance due to its high reducibility and labile oxygen.•Complete conversion of ethyl acetate was attained at temperatures lower than 280°C. The effect of the support was explored for Cu-based catalysts on the oxidation of ethyl acetate (EtOAc), a common volatile organic compound. In particular, four Rare Earth Oxide(s) (REO), namely CeO2, Gd2O3, La2O3 and Sm2O3, were used as supports to obtain the Cu/REO catalysts. The samples were characterized by N2 adsorption at −196°C (to determine the surface area), scanning electron microscopy, X-ray diffraction, X-ray photoelectron spectroscopy and temperature programmed reduction to gain insight into the impact of textural, structural and redox properties on the catalytic efficiency. The following sequence, in terms of EtOAc conversion, was revealed: Cu/CeO2>Cu/Gd2O3>Cu/Sm2O3>Cu/La2O3, which is closely related to the redox properties of the Cu/REO samples, in terms of reducibility and labile oxygen availability. Complete EtOAc conversion was achieved at temperatures as low as 275°C over Cu/CeO2, which was the most efficient catalyst.