Simultaneous catalytic removal of NOx and diesel PM over La(0.9) K(0.1) CoO3 catalyst assisted by plasma.
The simultaneous removal of NOx and particulate matter (PM) from diesel exhaust is investigated over a mixed metal oxide catalyst of La(0.9) K(0.1) CoO3 loaded on gamma-Al2O3 spherules with the assistant of plasma. It was found that NOx was reduced by PM in oxygen rich atmosphere, the CO2 and N2 were produced in the same temperature window without considering the N2 formed by plasma decomposition. As a result, the temperature for the PM combustion decreases and the reduction efficiency of NOx to N2 increases during the plasma process, which indicated that the activity of the catalyst can be improved by plasma. The NOx is decomposed by plasma at both low temperature and high temperature. Therefore, the whole efficiency of NOx conversion is enhanced.
Pei
Mei-xiang
MX
Institute of Internal Combustion Engine, Shanghai Jiaotong University, Shanghai 200030, China. pmxada@sjtu.edu.cn
Lin
He
H
Shangguan
Wen-feng
WF
Huang
Zhen
Z
D000393:Air Pollutants / Q000302:isolation & purification*; D000397:Air Pollution / Q000517:prevention & control*; D000537:Aluminum Oxide; D002384:Catalysis; D003035:Cobalt; D007811:Lanthanum; D009589:Nitrogen Oxides / Q000032:analysis / Q000302:isolation & purification*; D010316:Particle Size; D011188:Potassium; D001335:Vehicle Emissions / Q000032:analysis*
D000393:Air Pollutants; D009589:Nitrogen Oxides; D001335:Vehicle Emissions; D003035:Cobalt; D007811:Lanthanum; D000537:Aluminum Oxide; D011188:Potassium