Performance for the catalytic CO oxidation over the Mo0.5Sn9Co90.5O2 catalyst

Abstract

Abstract In this study, carbon monoxide catalytic oxidant MoSnCoOx was prepared by coprecipitating method to investigate the effect of MoO3 addition amount on catalyst activity. Meanwhile, the sulfur and water resistance of the catalysts were researched by simulating the industrial conditions of sintering smoke emission. The samples were studied using BET, XRD, SEM and H2-TPR techniques. The results revealed that catalyst added with 0.5% MoO3 had better activity than the original Sn9Co91O2 catalyst and its efficiency reached 98.04% at 70 °C. After 21 h reaction with sulfur and water in the flue gas, the catalyst efficiency only decreased to 89.75%. According to the results of characterization, Mo0.5Sn9Co90.5O2 catalyst could better resist sulfur and water, because the presence of MoO3 not only reduced the crystallinity of the catalyst, but it also increases the specific surface area and oxidation capacity.