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

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