Simulataneous Removal of NOx and Diesel PM over La0.9K0.1CoO3 Assisted by Plasma 18ICES/049
Authors
He Lin - Shanghai Jiao Tong University
Zhen Huang - Shanghai Jiao Tong University
Wenfeng Shangguan - Shanghai Jiao Tong University
Abstract
Simultaneous removal of NOx and diesel particulate matter (PM) was studied over mixed metal oxide catalyst of La0.9K0.1CoO3 with the assistant of non-thermal plasma. It was found that NOx was reduced by PM in oxygen rich atmosphere, and the CO2 and N2 were produced in the same temperature window without considering the N2 resulted from NO decomposition in the plasma zones. As the results of the assistant of the non-thermal plasma process, the burn out temperature of the PM decreases from 537 to 492 and the reduction efficiency of ℃ ℃ NOx to N2 increases from 10% to 33%, which suggest that the plasma process improves the activity of the catalyst. It was found that about 2~10 per cent of NOx was decomposed in the plasma zones at both low temperature and high temperature. Therefore, the whole conversion efficiency of NOx to N2 was enhanced. The mechanisms of the catalysis reactions promoted by the plasma process were discussed.