TiO(2)–SiO(2) supported MnWO(x) catalysts by liquid-phase deposition for low-temperature NH(3)-SCR

NH(3)-SCR is an environmentally important reaction for the abatement of NO(x) from different resources. MnO(2)-based catalyst has attracted significant attention due to the excellent activity. In this paper, a series of MnWO(x)/TiO(2)–SiO(2) catalysts were prepared by liquid-phase deposition method. The catalysts were characterized by N(2) adsorption/desorption, XRD, TEM, XPS, FT-IR, H(2)-TPR, TG and water adsorption capacity. The existence of SiO(2) improved the SO(2) and H(2)O resistance of the MnWO(x)/TiO(2)–SiO(2) catalyst without decreasing the NH(3)-SCR activity. Under the reaction conditions of 260°C and 60 000 ml g(cata) h(−1) gas hourly space velocity (GHSV), the NO conversion was kept stable at about 95% for 140 min on stream. The excellent performance of MnWO(x)/TiO(2)–SiO(2) catalyst is considered to be originated from the texture properties and active species dispersion improvement by SiO(2) in the support and low-temperature preparation.