红外与激光工程
紅外與激光工程
홍외여격광공정
INFRARED AND LASER ENGINEERING
2015年
4期
1178-1185
,共8页
李相贤%王振%徐亮%高闽光%童晶晶%冯明春%刘建国
李相賢%王振%徐亮%高閩光%童晶晶%馮明春%劉建國
리상현%왕진%서량%고민광%동정정%풍명춘%류건국
吸收系数%碳同位素比值%温室气体%傅里叶变换红外光谱%气体温度
吸收繫數%碳同位素比值%溫室氣體%傅裏葉變換紅外光譜%氣體溫度
흡수계수%탄동위소비치%온실기체%부리협변환홍외광보%기체온도
absorption coefficient%carbon isotope ratio%greenhouse gases%Fourier transform infrared spectroscopy%gas temperature
为了研究温度变化对温室气体及碳同位素比值光谱定量分析的影响,首先从理论上分析得出温室气体浓度及δ13CO2值的定量反演主要取决于吸收系数,并研究了吸收系数的计算方法。其次结合HITRAN数据库,研究了温度对线强、展宽以及吸收系数的影响规律,结果表明:压强为1 atm(1 atm=1.013×105 Pa)恒定条件下,温度变化时,吸收系数受线强变化的影响强于受展宽变化的影响。最后通过实验验证了温室气体和碳同位素比值傅里叶变换红外光谱( FTIR )反演的温度依赖关系,其中碳同位素比值受温度变化影响幅度最大,单位温度变化对δ13CO2值的影响为14.37‰。文中结果为高精度温室气体及碳同位素比值红外光谱监测装置中的温度监控系统设计提供了理论依据。
為瞭研究溫度變化對溫室氣體及碳同位素比值光譜定量分析的影響,首先從理論上分析得齣溫室氣體濃度及δ13CO2值的定量反縯主要取決于吸收繫數,併研究瞭吸收繫數的計算方法。其次結閤HITRAN數據庫,研究瞭溫度對線彊、展寬以及吸收繫數的影響規律,結果錶明:壓彊為1 atm(1 atm=1.013×105 Pa)恆定條件下,溫度變化時,吸收繫數受線彊變化的影響彊于受展寬變化的影響。最後通過實驗驗證瞭溫室氣體和碳同位素比值傅裏葉變換紅外光譜( FTIR )反縯的溫度依賴關繫,其中碳同位素比值受溫度變化影響幅度最大,單位溫度變化對δ13CO2值的影響為14.37‰。文中結果為高精度溫室氣體及碳同位素比值紅外光譜鑑測裝置中的溫度鑑控繫統設計提供瞭理論依據。
위료연구온도변화대온실기체급탄동위소비치광보정량분석적영향,수선종이론상분석득출온실기체농도급δ13CO2치적정량반연주요취결우흡수계수,병연구료흡수계수적계산방법。기차결합HITRAN수거고,연구료온도대선강、전관이급흡수계수적영향규률,결과표명:압강위1 atm(1 atm=1.013×105 Pa)항정조건하,온도변화시,흡수계수수선강변화적영향강우수전관변화적영향。최후통과실험험증료온실기체화탄동위소비치부리협변환홍외광보( FTIR )반연적온도의뢰관계,기중탄동위소비치수온도변화영향폭도최대,단위온도변화대δ13CO2치적영향위14.37‰。문중결과위고정도온실기체급탄동위소비치홍외광보감측장치중적온도감공계통설계제공료이론의거。
To study the influence of temperature change on the spectrum quantitative analysis of greenhouse gases and carbon isotope ratio,at first, the view that the quantitative analysis of greenhouse gases and δ13CO2 value was mainly determined by the absorption coefficient was analyzed theoretically, and the calculation method of the absorption coefficient was also studied. Then referring to the HITRAN database, the temperature dependence of line intensity, FWHM and absorption coefficient were studied, the results show that the effect of line intensity is stronger than the FWHM on the absorption coefficient when the pressure is constant at 1 atm while the temperature changes. At last, the temperature dependence of greenhouse gases and carbon isotope ratio quantitative analysis based on Fourier transform infrared spectroscopy (FTIR) method was confirmed through a series of experiment, and these experiments also present that the variation of carbon isotope is more serious than the greenhouse gases variation when the temperature changes, the δ13CO2 value will change 14.37‰ while the temperature changes 1 ℃. This study is the theoretical basis for the design of the temperature monitoring and controlling system of greenhouse gases and carbon isotope ration monitoring instrument based on FTIR with high-precision.