摘要
差分吸收光谱法（DOAS）应用于固定污染源烟气排放监测时，烟气温度对NO2的紫外可见吸收特性影响较大：在自制的试验台上，对NO2气体在温度30～390℃范围内的差分吸收光谱特性进行了实验研究。结果表明：温度在30～150气范围内，差分吸收截面随温度的升高呈现跳跃性变化，但其谱线形状不变；温度在150～270℃之间时，温度升高使得差分光谱峰值减小、谷值增大；当温度高于270℃后，差分吸收谱线的精细结构发生明显变化，峰谷数目增多。
When differential optical absorption spectroscopy is applied to monitor the flue gas emissions from a fixed pollution source,the flue gas temperature will exercise a relatively great impact on the NO2 visible ultraviolet absorption characteristics. On a self-made test stand,an experimental study has been conducted of the differential absorption spectrum characteristics of NO2 gas when its temperature falls in a range of 30～390 ℃. The test results show that when the temperature is in a range of 30～150 ℃,the differential absorption cross section will be subjected to a leap change in the presence of a temperature rise. However,its spectrum contour will be kept unchanged. When the temperature is in a range of 150～270 ℃,a temperature rise will lead to a decrease of the differential spectrum peak value and an increase of the valley value. When the temperature is higher than 270 ℃,a conspicuous change will occur to the fine configuration of the differential absorption spectrum and the number of peaks and valleys will increase.
出处
《热能动力工程》
EI
CAS
CSCD
北大核心
2008年第4期404-407,共4页
Journal of Engineering for Thermal Energy and Power
基金
国家自然科学基金资助项目(50576010)
教育部博士点基金资助项目(20040286038)
关键词
差分吸收光谱法
二氧化氮
吸收截面
温度影响
differential optical absorption spectroscopy (DOAS),nitrogen dioxide (NO2),absorption cross section,influence of temperatures
