| 光谱学与光谱分析 |
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| Study on Temperature Dependence of Ultraviolet Absorption Cross Sections of Nitric Oxide at High Temperatures |
| ZHOU Jie,ZHANG Shi-liang,CHEN Xiao-hu |
| College of Mechanical and Energy Engineering,Zhejiang University,Hangzhou 310027,China |
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Abstract To study the temperature dependence of ultraviolet absorption characteristics of NO species in flue gas,the absorption cross sections of NO in the spectral region 200-230 nm at temperatures ranging from 285 to 410 K were measured using a grating monochromator with 0.2 nm resolution,a deuterium lamp and a specially-fabricated closed sample cell. The absorption spectrum of NO consists of discrete bands superimposed on a continuous base. Results indicated that discrete absorption bands were present with a fixed wavelength interval of roughly 10.5 nm. The peaks of discrete bands decreased first and started to increase later as the temperature rose from 285 to 410 K,with a maximum relative variation of 19.3%. Peak position and half width of the absorption peaks did not exhibit apparent change with the variation of temperature. Continuous absorption cross section increased monotonously with the temperature,and the variation gradient gradually decrease with wavelength red shift. The absorption cross section of NO should not be considered as constant when applied in online monitoring of NO concentration in flue gas. A compensation calculation of absorption cross section with respect to temperature effect is indispensable for the purpose of improving online measurement precision of NO concentration.
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Received: 2006-02-18
Accepted: 2006-05-26
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Corresponding Authors:
ZHOU Jie
E-mail: zhoujie6801@zju.edu.cn
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| Cite this article: |
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ZHOU Jie,ZHANG Shi-liang,CHEN Xiao-hu. Study on Temperature Dependence of Ultraviolet Absorption Cross Sections of Nitric Oxide at High Temperatures[J]. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2007, 27(07): 1259-1262.
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| URL: |
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https://www.gpxygpfx.com/EN/Y2007/V27/I07/1259 |
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