Eun-Ku Lee

Influence of copper precursors in the steam reforming of methanol over Cu/SnO2/SiO2 catalysts

Cu/SnO2/SiO2 catalysts, prepared with three different copper precursors (copper nitrate, sulfate and chloride), were characterized and investigated for the steam reforming of methanol. Cu/SnO2/SiO2 catalyst, prepared with copper nitrate, showed the highest activity among the tested catalysts. The highest activity of the catalyst prepared with copper nitrate was ascribed to the highly dispersed Cu particles from CO adsorption experiment. The selectivity of methanol to H2 decreased with an increase in the amount of acid on the surface of Cu/SnO2/SiO2 catalysts from FT-IR experiments.

Magnesium oxide as an effective catalyst in catalytic wet oxidation of H2S to sulfur

Four different magnesium oxides were studied in the wet oxidation of H2S to sulfur. The H2S removal capacity of MgO in the catalytic wet oxidation strongly depends on the pore size distribution. The MgO with relatively large pores (>100 Å) showed a high removal capacity of H2S. It is suggested that the large pore size favors H2S removal in the catalytic wet oxidation due to the limitation of diffusion.