Zhang Bolin, Zhang Shengen, Liu Bo, Shen Hanlin, Li Lin
Institute for Advanced Materials and Technology, University of Science and Technology Beijing Beijing 100083 P. R. China
RSC Adv. 2018 Apr 3;8(23):12733-12741. doi: 10.1039/c8ra00336j.
A series of Mn-based catalysts were prepared by a wet impregnation method for the selective catalytic reduction (SCR) of NO with NH. The Mn/Ti-Zr catalyst had more surface area, Lewis acid sites, and Mn on its surface, and showed excellent activity and high N selectivity in a wide temperature range. NH and NO oxidation was investigated to gain insight into NO reduction and NO formation. The formation of NO was primarily dominated by the reaction of NO with NH in the presence of O the Eley-Rideal mechanism. An intimate synergistic effect existed between the Mn-based and the Ti-Zr support. It was demonstrated that the Ti-Zr support greatly promoted the catalytic performance of Mn-based catalysts.
采用湿浸渍法制备了一系列用于NH₃选择性催化还原（SCR）NO的锰基催化剂。Mn/Ti-Zr催化剂具有更大的表面积、更多的路易斯酸位点以及表面锰含量，在较宽温度范围内表现出优异的活性和高N₂选择性。对NH₃和NO氧化进行了研究，以深入了解NO还原和NO生成情况。在O₂存在下，NO的生成主要由NO与NH₃的反应主导，即埃利-里德尔机理。锰基催化剂与Ti-Zr载体之间存在紧密的协同效应。结果表明，Ti-Zr载体极大地促进了锰基催化剂的催化性能。
