Characterization of Multi-Tips Pulsed Corona Discharges in Air at Atmospheric Pressure for VOC Removal
A. Mraihi, N. Merbahi, M. Yousfi, O. Eichwald, M. Martignac, and F. Benoit Marquiﾃｩ
University of Toulouse, LAPLACE UMR CNRS 5213, University Paul Sabatier, France
University of Toulouse, IMRCP UMR CNRS 5623, University Paul Sabatierard, France
Abstract- Non thermal plasma is an interesting alternative for degradation of pollutants in escape gas coming for instance from industries or automobiles. The optimization of non thermal plasma reactors need further research works in order more particularly to increase the efficiency of the production of the active species responsible of pollutant removal. Present results are devoted to experimental studies of non thermal plasma produced by positive corona discharge in dry air at atmospheric pressure in cases of both mono- and multi-tips. In the multi-tips case, the electric behavior is analyzed as a function of the distance between two contiguous tips in order to highlight the region of creation of active species for the lowest dissipated power. The optical emission spectra are measured in UV- visible- NIR wavelength range between 200 nm to 800 nm, in order to identify some excited species present in the pulsed corona discharge and also to measure the rotational and vibrational temperatures. Last, we performed preliminary tests to measure the efficiency of the present multi-tips corona discharges to remove VOC pollutants from air.
Keywords- Non thermal Plasmas, multi-tips corona discharge, gas temperatures, VOC removal