摘要
为了考察SO2气体在不同排放条件下的吸收特性，研究SO2气体在紫外200-240nm内吸收截面随气压的变化规律．采用分辨率为0．05nm的光栅单色仪、氘灯光源、闭式气样室和配气装置，测量SO2气体在绝对压力由63．7kPa增大至162．1kPa过程中的透射率，并依据Beer—Lambert定律，计算出SO2单色吸收截面．结果表明，SO2单色透射率随气压增强而逐渐增大，最大变化率约40％，单色吸收截面随气压增大逐渐减小，最大变化率约35％，而吸收截面差值在200-240nm波段内逐渐变小．SO2紫外吸收谱线存在压力碰撞展宽现象．在SO2浓度测量时有必要对吸收截面进行压力补偿计算。
In order to investigate the absorption characteristic of SO2 under various emission conditions, the effects of gas pressure on its absorption cross-sections at ultraviolet 200-240 nm were studied. After the grating monochromator with resolution of 0.05 nm, the deuterium lamp, the closed gas sample cell and the gas compounding device were used, various transmissions of SO2 at absolute pressures from 63.7 kPa to 162.1 kPa were measured. Monochromatic absorption cross-sections of SO2 were derived using Beer-Lam- bert law. Results indicate that the monochromatic transmission increases and the absorption cross-section decreases as gas pressure increases, with maximum change of 40% and 35% respectively. Differences of absorption cross-sections decrease at the wave band 200-240 nm. The phenomena of pressure collision broadening exist in the SO2 ultraviolet absorption spectrum. A compensation calculation for pressure effects on absorption cross-section should be carried out in SO2 concentration measurement.
出处
《浙江大学学报（工学版）》
EI
CAS
CSCD
北大核心
2006年第6期947-950,共4页
Journal of Zhejiang University：Engineering Science
基金
国家自然科学基金资助项目(50376058)
关键词
紫外
吸收截面
压力
二氧化硫
ultraviolet
absorption cross-section
pressure
sulfur dioxide
