Abstract
This paper describes the effect of loaded metal(including Fe, Cu, Mn, and Co) on catalytic performance of γ-Al2O3 catalysts for the removal of CH3SH. The catalysts are synthesized by the method of impregnation, and used in room temperature to absorb CH3SH. The experiment investigated the effect of components, loading and calcination temperature for the catalytic activity. The results showed that metal-modified γ-Al2O3 can enhance removal effect of CH3SH. CH3SH removal capacity of various metal-reforming catalysts decline as follows: Cu–Mn/γ-Al2O3> Cu–Co/γ-Al2O3≈ Cu/γ-Al2O3> Cu–Fe/γ-Al2O3> Co/γ-Al2O3> Mn/γ-Al2O3> Fe/γ-Al2O3. Among these samples the γ-Al2O3 catalyst loaded with 15% Cu and 5% Mn has the best removal rate and stability, which could reach a 100% removal rate of CH3SH in about 85 min. The catalysts were characterized by XRD, N2-adsorption/desorption techniques, CO2-TPD and FT-IR. It indicated that CuO was the mainly active ingredient on γ-Al2O3 carrier. Meanwhile, as the second elements, MnOx was in favor of diffusion of CuO on the carrier and improved activity of catalyst.
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