红外吸收-热导法测定生物质燃料中碳氢氮含量  

Determination of carbon,hydrocarbon and nitrogen content in biomass fuel by infrared absorption-thermal conductivity method

作　　者：王勇 施宗友 李国伟 张远琴 WANG Yong;SHI Zongyou;LI Guowei;ZHANG Yuanqin(Panxi Institute of Vanadium and Titanium Inspection and Testing,National Quality Supervision and Inspection Center of Vanadium and Titanium Products,Panzhihua 617000,China)

机构地区：[1]攀西钒钛检验检测院,国家钒钛制品质量检验检测中心,四川攀枝花617000

出　　处：《化学分析计量》2024年第6期50-54,共5页Chemical Analysis And Meterage

摘　　要：采用不同碳、氢、氮含量的生物质和煤标准样品绘制仪器标准曲线,建立红外吸收-热导法测定生物质燃料中碳、氢、氮含量。在样品中加入氧化钙吸收剂,有效消除红外吸收-热导法测定生物质燃料中碳、氢时氟、氯、硫的干扰,同时提高炉试剂的使用寿命,节约仪器维护成本。样品量为0.10 g时,添加0.04 g氧化钙能有效吸收样品中23%的氟、氯、硫。各元素定量限分别为碳0.0067%,氢0.056%,氮0.029%。对生物质燃料样品及生物质分析标准样品测量,各元素测定结果的相对标准偏差小于2.0%(n=5),标准样品测量值在参考值范围内,准确度较好。Biomass and coal standard samples with different carbon,hydrogen,and nitrogen contents were used to draw instrument standard curves,and an infrared absorption-thermal conductivity method was established to measure the content of carbon,hydrogen and nitrogen in biomass fuels.The interference caused by fluorine,chlorine,and sulfur during the infrared absorption-thermal conductivity method for determining carbon and hydrogen content in biomass fuels were effectively eliminated by incorporating calcium oxide absorbent into the sample.At the same time,the service life of the furnace reagent was improved and the maintenance cost of the instrument was saved.When the sample was 0.10 g,0.04 g calcium oxide could effectively absorb 23%of fluorine,chlorine,and sulfur in the sample.The limits of quantitation of each element were 0.0067%for carbon,0.056%for hydrogen and 0.029%for nitrogen.The relative standard deviation of the determination results of each element was less than 2.0%for biomass fuel samples and biomass analysis standard samples(n=5),and the measurement values of the standard samples were within the error range,with good accuracy.

关 键 词：生物质燃料 红外吸收法 热导 碳 氢 氮 

分 类 号：O657[理学—分析化学]