Plasma Assisted NOx Removal Using Modified Attapulgite Clay Catalyst
M. Chen1, 2, K. Takashima1, and A. Mizuno1
1Department of Environmental and Life Sciences, Toyohashi University of Technology, Japan
2School of Chemical Engineering, Anhui University of Science and Technology, China
Abstract— A Modified Attapulgite Clay (MAC) catalyst for plasma assisted NOx removal is presented in this paper. The effect of applied voltage for plasma generation and of MAC calcination temperature on the NOx removal efficiency was investigated. Micro-structure of MAC at different calcination temperatures was analyzed by scanning electron microscope (SEM). The experimental results show that NOx removal ratio increases with the voltage, and the calcination temperature has a significant influence. For calcination temperatures within the range of 400oC to 600oC, MAC shows good adsorbing and storage ability of NOx even at room temperature. By plasma, NO is oxidized to NO2 and furthermore to NO3-. For input voltages above 30 kV, the highest NOx removal ratio of 89.6% was observed.
Keywords— Non-thermal plasma, DBD reactor, NOx removal, modified attapulgite clay, packed bed