查找使用阿拉丁产品的科研文献

The influence of the pore structure on the SO2 tolerance for selective catalytic reduction of NOx with NH3 over MnOx-TiO2/MWCNTs catalysts

Xie Chong,Shi Jian-Wen,Yang Shenghui,Li Xifei

The MnO x -TiO 2 /MWCNTs nanocomposites were used as De-NO x catalysts to study the deep-rooted reason for the deactivation. Based on a series of characterization on as-prepared catalyst and poisoned catalyst, the results showed that the chief culprit for the deactivation is the micropores in the De-NO x catalyst. The formed ammonium (bi)sulfate in the micropores during the SCR reaction process could not be took away by the gas flow soon and then deposited on the catalyst surface gradually, and further covered the active sites. And the poisoned catalysts could be recovered partly rather than fully by heat treatment at 500 °C because of the decomposition of the ammonium (bi)sulfate and the phase transition of the TiO 2 .