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Dynamics of infrared laser-induced pyrolysis of 1-chloro-1,1-difluoroethane
Ma, PH; Wu, B; Jing, Y; Hering, P; Ivanenko, MM; Fuss, W
1999-11-01
Source PublicationJOURNAL OF ANALYTICAL AND APPLIED PYROLYSIS
Volume52Issue:2Pages:167-177
SubtypeArticle
AbstractThe dynamics of infrared (IR) laser-induced pyrolysis of CF2ClCH3 has been studied by using a TEA CO2 laser radiation which consisted of a main pulse of 100 ns followed by a tail of 7 mu s containing 70% of total energy. The minimum laser fluence for the effective decomposition of CF2ClCH3 is about 1.5 J cm(-2) at 10P12 laser line (951.19 cm(-1)). Over a moderate range of laser fluence 1.5-7 J cm(-2), the detected product was CF2CH2 generated via the elimination reaction of HCl from CF2ClCH3 and there was no evidence to support HF elimination from CF2ClCH3. The cross sections of photon absorption of CF2ClCH3 are measured as a function of laser fluence. The dependence of decomposition probability on pressure shows collisional dissociation at lower pressure and thermal reaction characteristics at high pressure. A model of rate equation has been used to calculate the population distributions of vibrational levels and decomposition probabilities for three kinds of laser pulse durations, which are in accord with the measured experimental results. The model calculation indicates that long laser pulse gives a wide population at the lower vibrational levels and leads to a relatively low decomposition probability. (C) 1999 Elsevier Science B.V. All rights reserved.
KeywordPyrolysis 1-chloro-1 Infrared Laser 1-difluoroethane
WOS HeadingsScience & Technology ; Physical Sciences ; Technology
WOS KeywordDISSOCIATION
Indexed BySCI
Language英语
WOS Research AreaChemistry ; Spectroscopy
WOS SubjectChemistry, Analytical ; Spectroscopy
WOS IDWOS:000083519200003
Citation statistics
Document Type期刊论文
Identifierhttp://ir.isl.ac.cn/handle/363002/6024
Collection青海盐湖研究所知识仓储
Affiliation1.Chinese Acad Sci, Qinghai Inst Salt Lakes, Xining 810008, Qinghai, Peoples R China
2.Univ Dusseldorf, Inst Lasermed, D-40001 Dusseldorf, Germany
3.Max Planck Inst Quanteopt, D-85740 Garching, Germany
Recommended Citation
GB/T 7714
Ma, PH,Wu, B,Jing, Y,et al. Dynamics of infrared laser-induced pyrolysis of 1-chloro-1,1-difluoroethane[J]. JOURNAL OF ANALYTICAL AND APPLIED PYROLYSIS,1999,52(2):167-177.
APA Ma, PH,Wu, B,Jing, Y,Hering, P,Ivanenko, MM,&Fuss, W.(1999).Dynamics of infrared laser-induced pyrolysis of 1-chloro-1,1-difluoroethane.JOURNAL OF ANALYTICAL AND APPLIED PYROLYSIS,52(2),167-177.
MLA Ma, PH,et al."Dynamics of infrared laser-induced pyrolysis of 1-chloro-1,1-difluoroethane".JOURNAL OF ANALYTICAL AND APPLIED PYROLYSIS 52.2(1999):167-177.
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