Remediation of various naturally oxygenated volatile organic compounds (O-VOCS) by Mn- and Cr-supported g -Al2O3 nanocatalysts

Authors : Dariush SALARI, Aligholi NIAEI, Seyed Ali HOSSEINI

Pages : 793-802

Doi:10.3906/vet-1204-11

View : 15 | Download : 8

Publication Date : 0000-00-00

Article Type : Research Paper

Abstract :The catalytic combustions of different naturally oxygenated volatile organic compounds insert ignore into journalissuearticles values(ethyl acetate, isopropanol, methyl ethyl ketone insert ignore into journalissuearticles values(MEK);, and benzyl alcohol); alone and in binary mixtures were investigated over pure g -Al2O3, Mn/g -Al2O3, and Cr/g -Al2O3. The catalysts were prepared by the wet impregnation method and were characterized using XRD, ICP-AES, SEM, and BET. Mn/g -Al2O3 showed higher activity than others in combustion of the O-VOCs, whereas complete conversion of isopropanol insert ignore into journalissuearticles values(the most reactive O-VOC); occurred at 350 °C and 400 °C on Mn/g -Al2O3 and Cr/g -Al2O3, respectively. The following order was found for reactivity of organic compounds in single form: isopropanol > benzyl alcohol > ethyl acetate > MEK. There was no relation between activity of the catalyst and BET surface area. An inhibition/promotion effect was found in the oxidation of O-VOC binary mixtures because of the competitive adsorption on the catalyst, leading to an oxidation behavior for O-VOC binary mixtures different than that of single components. The presence of water vapor as a co-feed had an inhibition effect on isopropanol oxidation and was temperature-dependent such that it decreased above 350 °C.
Keywords : Oxygenated organic compounds, catalytic oxidation, Mn g Al2O3, Cr g Al2O3, nanocatalyst