Akademik Veri Yönetim Sistemi
FRESENIUS ENVIRONMENTAL BULLETIN, cilt.13, ss.1518-1520, 2004 (SCI-Expanded)
This study is focused on the use of natural and acid-washed pumice, a volcanic rock with high porosity, in the adsorption and the catalytic oxidation of methanol, a volatile organic component of wastewaters, under batch reaction conditions. The pumice was ground to 1 mm-sized particles and washed with H2SO4. The adsorption experiments were carried out with natural and acid-washed particles and their equilibrium adsorption capacities were determined in inert gas (N-2) atmosphere at 30degreesC and atmospheric pressure. Pumice was used as a supporting adsorption material in oxidation studies, and the catalysts were prepared by covering it with Pt. The experiments were carried out in 250 mL batch reactors under dry air conditions and, after activation of the catalysts, the conversion ratios of methanol into CO2 were determined. Methanol was adsorbed by 35.6 % on acid-washed and 25.6 % on natural pumice materials under semi-batch conditions at 50degreesC. The conversion ratios were found to be 50.5 % with acid-washed Pt/pumice catalyst and 19 % with natural pumice-supported catalyst.