掺杂元素的氧化锰基低温NH_3选择性还原氮氧化物催化剂研究进展

Research progress in manganese oxide-based catalysts doped with different elements for low-temperature selective catalytic reduction of NOx with NH_3

氨气选择性催化还原技术(NH3-SCR)是控制氮氧化物排放的有效方法,但由于传统的氧化钒催化剂起活温度偏高,存在运行成本高等不足。近年来,开发具有低温活性的高效脱硝体系成为选择性催化还原技术的研究热点。其中,氧化锰催化剂是目前研究较为广泛的低温NH3-SCR催化剂。综述了近年来国内外关于不同掺杂元素对氧化锰基低温催化剂催化性能影响的研究进展,阐述了掺杂Ce、Fe和其他元素的锰基催化剂的低温NH3-SCR反应性能、反应机理、抗硫抗湿性能及其工业化应用前景,展望了氧化锰基低温NH3-SCR催化剂未来的发展方向。

Selective catalytic reduction of Nox by NH3 （ NH3-SCR） technology is an effective way to con- trol the emission of nitrogen oxides. The conventional vanadium oxide catalysts can work effectively only at high temperature, so it has the shortage of high operating cost. In recent years, the development of new catalysts with high activity and stability at low temperature has become the research focus of the selective catalytic reduction technology. Manganese oxides catalysts were widely studied in the field of low-tempera- ture NH3-SCR catalysts. The recent research advance on manganese oxide-based catalysts with different doping elements was reviewed in this paper. The reactivity and reaction mechanism of manganese oxide- based catalysts doped with the elements Ce and Fe for low-temperature selective catalytic reduction of nitrogen oxides with ammonia and their tolerance to water vapor and sulfur dioxide were summarized. The commercial application prospect and development direction of manganese oxide-based catalysts for low- temperature NH3-SCR in the future were outlined