论文类型：期刊论文

发表时间：2006-02-01

发表刊物：SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY

收录刊物：SCIE、EI、PubMed

卷号：63

期号：2

页面范围：477-482

ISSN号：1386-1425

关键字：OH radicals; emission spectrum; pulsed corona discharge; water vapor; relative population

摘要：In this study, the emission spectra of OH (A(2)Sigma -> X(2)Pi,0-0) emitted from the high-voltage pulsed corona discharge (HVPCD) of N-2 and H2O mixture gas and humid air in a wire-plate reactor were successfully recorded against a severe electromagnetic interference coming from HVPCD at one atmosphere. The relative vibrational populations and the vibrational temperature of N2 (C, V) were determined. The emission spectra of the Delta v = +1 (1-0, 2-1, 3-2, 4-3) vibration transition band of N-2 (C(3)Pi(u)-> B(3)Pi(g)) is simulated through gauss distribution. The emission intensity of OH (A(2)Sigma -> X(2)Pi, 0-0) has been exactly gotten by subtracting the emission intensity of the Delta v = + 1 vibration transition band of N-2 (C(3)Pi -> B(3)Pi(g)) from the overlapping spectra. The relative population of OH (A(2)Sigma) has been obtained by the emission intensity of OH (A(2)Sigma -> X(2)Pi, 0-0) and Einstein's transition probability. The influences of pulsed peak voltage and pulse repetition rate on the relative population of OH (A(2)Sigma) radicals in N-2 and H2O mixture gas and humid air are investigated separately. It is found that the relative population of OH (A(2)Sigma) rises linearly with increasing the applied peak voltage and the pulse repetition rate. When the oxygen is added in N-2 and H2O mixture gas, the relative population of OH (A(2)Sigma) radicals decreases exponentially with increasing the added oxygen. The main involved physicochemical processes have also been discussed. (c) 2005 Elsevier B.V. All rights reserved.

发表时间：2006-02-01