(521cw) The Noble Metal Promoted V-W/TiO2 Catalyst for Simultaneous Removal NOx and CO on the Dual-Functional Catalyst

Currently, there is a heightened awareness regarding air pollution, which has led to more stringent regulations on air pollutants. Air pollution is predominantly caused by NO_x and CO, which comprise around 45% of total air pollutants in South Korea. These pollutants are largely emitted by fuel combustion, including power plants. To comply with the emission regulations, abatement technologies such as selective catalytic reduction with NH₃ (NH₃-SCR) and catalytic oxidation of CO are used to reduce the emission of air pollutants. While some catalysts have been developed to remove both NO_x and CO simultaneously, their limited operating temperature range and poor moisture resistance pose significant challenges.

In this study, we prepared the noble metal-promoted V-W/TiO₂ catalysts and investigated the possibility of simultaneous removal of CO and NO_x in one catalyst, and as a result, the Pd was considered as the suitable promoter. In the next step, Pd concentration on the catalyst was optimized. It was confirmed that the 0.3 wt% Pd-doped V-W-0.3Pd/Ti catalyst could remove NO_x and CO in a wide temperature range from 230 °C to 369 °C (>90% DeNO_x and CO removal efficiency simultaneously). In addition, we systematically investigated the characterization of each catalyst using DRIFT-IR, XPS, Raman spectroscopy, and temperature-programmed methods (CO-TPD, NH₃-TPD, NO-TPD, and H₂-TPR).

Acknowledgement

This work was conducted under the framework of Research and Development Program of the Korea Institute of Energy Research (KIER) (C3-2438).