Rn. Li et X. Liu, Main fundamental gas reactions in denitrification and desulfurization fromflue gas by non-thermal plasmas, CHEM ENG SC, 55(13), 2000, pp. 2491-2506
Numerous species and their fundamental reactions are involved in non-therma
l plasma (NTP) hue gas cleaning kinetics, but only a few species and their
reactions are important. In this paper, the CSTR simulation is utilized to
analyze the NTP processes so as to establish the kinetic equations in a log
ical manner. In addition, by comparing the reaction rates of different spec
ies, it is found that only three kinds of reactions (positive ion charge tr
ansfer, metastable reactions and radical reactions) are significant for den
itrification and desulfurization. Thus the whole set of kinetic equations c
an be divided into three subsets, each of which corresponds to one kind of
reaction. Furthermore, almost all the characteristic times of the reactions
of interest are much shorter than the practical treatment time. So, the NT
P processes are considered to reach their stationary states. Solving the st
ationary kinetic equations and calculating the related reaction rates, the
main species and their main reactions in four concrete cases of NTP denitri
fication and desulfurization are picked out. Effects of different condition
s on NTP denitrification and desulfurization are discussed. (C) 2000 Elsevi
er Science Ltd. All rights reserved.