Vanadium-based catalysts for selective catalytic reduction of NOx with ammonia: Synthesis, poisoning mechanism, regeneration methods and research prospects

Selective catalytic reduction with NH3 (NH3-SCR) technology has been widely extensively to eliminate NOx. Developing low-temperature (LT) SCR catalysts with high removal efficiency remains a significant challenge. Numerous investigations have demonstrated that VOx-based catalysts have a broad working temperature range and excellent LT activity in reducing NOx in an oxidizing environment. The review concludes recent research on VOx-based catalysts for LT SCR reaction. In this review, five aspects of VOx-based catalysts were introduced in detail, including the study on the summary of VOx-based catalysts, preparation strategy, study on the main active sites and reaction mechanism, deactivation factors of catalysts, and the regeneration of deactivated VOx-based catalysts. Finally, the future development prospects and directions of VOx-based catalysts for LT SCR removal of NOx were proposed.