Indexed by:期刊论文
Journal:SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
Included Journals:SCIE、EI、PubMed
Volume:63
Issue:2
Page Number:477-482
ISSN No.:1386-1425
Key Words:OH radicals; emission spectrum; pulsed corona discharge; water vapor; relative population
Abstract: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.
Date of Publication:2006-02-01