Energy Efficiency of Plasma-Chemical NO Synthesis Excitation and Relaxation Factors

Total energy efficiency q) of the non-equihbrium plasma synthesis of NO from air or N2-O2 mixtures, stimulated by vibrational excitation, can be subdivided into three factors the excitation factor q x), the relaxation factor ( rei), and the chemical factor (/jchem, to be considered in the next section)  

The excitation factor q ) is due to energy losses related to the excitation of low productive degrees of freedom. For the aforementioned mechanism, the percentage of discharge energy going to vibrational excitation of N2 is shown. Thus, at Te 1 eV, ) ex = 0.8-0.9 see Fig. 6-5. 

With an accuracy of about (ho /Egf, the total VT-relaxation energy losses (6 8) can be approximated by the Planck vibrational energy corresponding to the critical vibrational temperature i vT ev(Tv ). The relaxation factor can then be expressed as a function of specific energy input E  

The relaxation factor determines the threshold of the dependence (i v) for NO synthesis stimulated by vibrational excitation 0.5-0.8J/cm (see Fig. 6-1). 

Energy Efficiency of Piasma-Chemicai NO Synthesis Chemicai Factor 

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