Removal of methanethiol by sepiolite and various sepiolite-metal compound complexes in ambient air

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In ambient air having 60% relative humidity (RH) at 25℃, the adsorption of methanethiol by sepiolite was studied by comparison with that by coconut-shell active carbon. The amount of methanethiol adsorbed by sepiolite was as small as O. 12μmol/g in the air with 1 ppm methanethiol, while, the amount by active carbon was as large as > 1.1μmol/g in the air with ≦0.03 ppm methanethiol. Methanethiol was converted into dimethyldisulfide on active carbon. In ambient air having 6O% RH at 25℃, the removal of methanethiol by the sepiolite-metal complexes was also studied by comparison with that by the corresponding metal compounds. The removal rate of methanethiol on the sepiolite-metal complexes was larger than that on the corresponding metal compounds. In the oxidation reaction of methanethiol to dimethyldisulfide in the presence of the sepiolite-metal compound complexes, sepiolite much enhances the catalytic action of metal compounds such as metal chloride and oxalate, and metallophthalocyanine.
日本粘土学会の論文