首页|Anti-sulfur selective catalytic reduction of NOx on Sb-doped OMS-2
Anti-sulfur selective catalytic reduction of NOx on Sb-doped OMS-2
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NSTL
Elsevier
Sb doped cryptomelane-type manganese oxides (Sb-OMS-2) with Sb/Mn molar ratios of 0-0.4 were synthesized and investigated for low-temperature selective catalytic reduction of NO by CO (CO-SCR). The resulting catalyst was characterized by X-ray diffractometer (XRD), specific surface area analyzer (BET), scanning electron microscope (SEM), transmission electron microscope (TEM) and X-ray photoelectron spectroscopy (XPS). As a result, the doping of Sb increased the specific surface area and oxygen vacancy concentration of the catalyst. At the same time, most Sb entered the lattice of MnO(6 )to form Sb-O bonds, and a small number of Sb ions replaced K+ in the tunnel. Sb and Mn synergistically catalyzed the reduction of NO. Compared with undoped OMS-2, the NO conversion rate of Sb-0.2-OMS-2 increased from 60% at 150 C to 83%, and from 80% at 300 C to 95%. In the presence of SO2, the NO conversion rate of Sb0.2-OMS-2 at 300 C was 88%, while that of OMS-2 was only 60%.
NSTL
Elsevier
