The new challenges for the development of NH₃-SCR catalysts under new situation of energy transition in power generation industry

NH₃-SCR was one of the most promising deNO_x technologies and it has been widely applied in industrial NO_x reduction. However, with the further development of energy transformation in power generation sector, the development of NH₃-SCR catalysts is facing some new challenges. It is becoming an urgent problem to solve low catalytic activity and stability of NH₃-SCR catalysts at the working condition of ultra-low temperature (≤ 200 °C) and high concentrations of H₂O+SO₂ due to the gradual deployment of new energy power plants. Furthermore, the traditional coal-fired power plants would need flexible operation with the increasing share of renewable energy generation. The NH₃-SCR catalysts which were applied in coal-fired power industry would be requested to work in a wide temperature window from 200°C to 500 °C in the near future. Therefore, in this review, we summarized the progress of NH₃-SCR catalysts in solving these different industrial problems in recent years. And the research directions which were deserved to be focused on the development of NH₃-SCR catalysts for the energy transition of power generation sector are proposed.