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基于傅里叶红外光谱仪的含氮化学品火焰光谱辐射特性研究
投稿时间:2019-12-03  修订日期:2019-12-06  点此下载全文
引用本文:王皓文,唐瑾,胡天佑,宁甲练,陈志莉.基于傅里叶红外光谱仪的含氮化学品火焰光谱辐射特性研究[J].红外,2020,41(2):31~36
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作者单位E-mail
王皓文 桂林理工大学环境科学与工程学院 609815185@qq.com 
唐瑾 桂林理工大学环境科学与工程学院  
胡天佑 桂林理工大学环境科学与工程学院  
宁甲练 生态环境部华南环境科学研究所  
陈志莉 桂林理工大学环境科学与工程学院 2138156475@qq.com 
基金项目:国家自然科学(2197060905);桂林理工大学科研启动基金(GUTQDJJ20172017075)
中文摘要:为了快速监测和识别化学品火灾,基于傅里叶红外光谱仪搭建了火焰光谱测试平台,并在室内封闭条件下对丙烯腈、乙腈两种含氮化学品以及无水乙醇的火焰光谱进行了监测分析研究(光谱范围为600~8000 cm-1)。结果表明,在相同的燃烧条件下,分子辐射强度由强到弱依次为丙烯腈、乙腈、无水乙醇。这是由于丙烯腈和乙腈燃烧会产生比无水乙醇多的H2O分子,而且丙烯腈燃烧会产生大量炭黑。在对这三种化学品的燃烧火焰光谱进行去噪平滑处理后,它们大幅相似,但在1650 cm-1、1830 cm-1、2857 cm-1、3750 cm-1波数处也存在高温含氮气体独有的区分。结果表明,利用傅里叶红外光谱仪监测含氮化学品火焰光谱辐射的研究可为增强我国化学品火灾快速识别与发现能力提供理论及实践依据。
中文关键词:光谱学  含氮化学品  火焰光谱  光谱数据库
 
Spectral Radiation Characteristics of Nitrogen-containing Chemicals Based on Fourier Transform Infrared Spectroscopy
Abstract:In order to quickly monitor and identify chemical fires, a flame spectrum test platform was established based on a Fourier infrared spectrometer, and the flame spectra of acrylonitrile, acetonitrile, two nitrogen-containing chemicals, and absolute ethanol were monitored and analyzed under indoor closed conditions. The spectral range is 600-8000 cm-1. The results show that the molecular radiation intensity from strong to weak under the same combustion conditions is acrylonitrile, acetonitrile, and absolute ethanol. This is because the combustion of acrylonitrile and acetonitrile will produce more H2O molecules than anhydrous ethanol, and the combustion of acrylonitrile will a large amount of carbon black is produced. After denoising and smoothing the combustion flame spectra of these three chemicals, the flame spectra of acrylonitrile, acetonitrile, and absolute ethanol are substantially similar, but there are also unique differences in high-temperature nitrogen-containing gas at the wave numbers of 1650, 1830, 2857, and 3750. Experimental conclusions: The research on the use of Fourier infrared spectroscopy to monitor the flame spectral radiation of nitrogen-containing chemicals can enhance the ability to quickly identify and discover chemical fires in China, and provide theoretical and practical evidence.
keywords:spectroscopy  nitrogenous chemicals  flame spectrum  spectral database
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