WO3/TiO2-ZrO2催化剂选择性催化还原NOx的研究

iO2-ZrO2 solid solution carriers were synthesized by a co-precipitation method and were impregnated with WO3 to obtain series of WO3/ TiO2-ZrO2 catalysts. The influence of WO3 loadings on the catalyst activity was investigated. The catalysts were characterized by using a combination of X-ray diffraction (XRD), BET surface area, NH3-Temperature programmed desorption (NH3-TPD), H2-Temperature programmed reduction (H2-TPR) and High-Resolution Transmission Electron Microscope (HRTEM). It is found that 9% WO3/ TiO2-ZrO2 has a better de-nitration activity within the wide temperature range and exhibits excellent stability at high temperature. The characterization results indicates that: TiO2-ZrO2 carrier is amorphous with large specific surface area; WO3is highly dispersed on the carrier and interacts strongly with the binary oxides support.