Online diagnosis of electron excitation temperature in CH4+H2 discharge plasma at atmospheric pressure by optical emission spectra

Methane coupling under low temperature plasmas at atmospheric pressure is a green process by use of renewable sources of energy. In this study, CH4+H-2 discharge plasma was on-line diagnosed by optical emission spectra so as to characterize the discharge system and to do spade work for the optimization of the technical parameters for future commercial production of methane coupling under plasmas. The study was focused on a calculation method for the online diagnosis of the electron excitation temperature in CH4+H-2 discharge plasma at atmospheric pressure. The diagnostic method is easy, efficient and fairly precise. A serious error in a literature was corrected during the reasoning of its series of equations formerly used to calculate electron temperatures in plasmas.