[2D05-08] Environmental chemistry 2

[2D06] W-Substituted Vanadium Oxide Catalyst for Low-Temperature DeNOx in the Presence of Water Vapor

○Yusuke Inomata¹, Eiji Kiyonaga², Keiichiro Morita², Kazuhiro Yoshida², Hiroe Kubota³, Takashi Toyao³, Ken-ichi Shimizu³, Masatake Haruta¹, Toru Murayama^1,4 (1. Research Center for Gold Chemistry, 2. The Chugoku Electric Power Company, Incorporated, 3. Hokkaido University, Institute for Catalysis, 4. Au-SDARC, Yantai University)

The conventional NH₃-SCR (selective catalytic reduction) catalyst needs a high reaction temperature (300^oC<). Therefore, the catalyst is usually placed just after the boiler system. Consequently, the catalyst is deactivated by ash and sulfate generated from the reaction of ammonia and SO_2. Thus, the development of a practical low-temperature NH₃-SCR catalyst is an urgent task. In this work, W-substituted vanadium oxide catalysts were synthesized for a low temperature (100-150^oC) deNOx process. The reaction mechanism was also analyzed both under dry and wet atmosphere at a low temperature (150^oC) using in situ and operando spectroscopies.