红外光谱法测定煤灰中硫含量的研究  

Determination of sulfur contentin coal using infrared spectroscopy

作　　者：武宏香 刘东艳[1] 刘颖[1] 张凤英[1] 葛琳[1] WU Hong-xiang;LIU Dong-yan;LIU Ying;ZHANG Feng-ying;GE Lin(Public Technical Service Center,Institute of Coal Chemistry,Chinese Academy of Science,Taiyuan 030001,China)

机构地区：[1]中国科学院山西煤炭化学研究所公共技术服务中心,山西太原030001

出　　处：《煤质技术》2018年第4期23-26,40,共5页Coal Quality Technology

摘　　要：探讨了红外光谱法测定煤灰中硫含量的可行性,利用无水硫酸钙和二氧化硅混合物模拟煤灰建立1条线性标准曲线,能够满足灰成分中硫含量在0.01%~11.78%范围内的测定,线性误差为0.901 5%,利用该标准曲线测定了7个煤灰标准物质以核查方法准确度和精密度,相对误差和相对标准偏差均在5%以内,加标回收率在100%~104%。由研究可知,红外光谱法是1种理想可行的灰中硫含量测定方法,1 300℃燃烧温度可满足灰中硫含量的测定条件,也可适当提高燃烧温度以减少单次测样时间。The feasibility of sulfur content in coal ash determination using infrared spectroscopy was discussed in the paper,using anhydrous calcium sulfate and silica mixture to simulate the coal ash to establish a linear standard curve was done,it could meet the requirements of sulfur content in ash components determination in the range of 0.01% ~11.78%,the linearity error is0.901 5%,using this standard curve,seven coal ash standard materials were determined to check the accuracy and precision of this method,the relative error and relative standard deviation were all in 5%,the recovery rate was in 100% ~104%,the research showed that,the infrared spectroscopy is an ideal and feasible method to determine the sulfur content in ash,the burning temperature of 1 300 ℃ could meet the determination condition,the combustion temperature could also be improved to reduce the single sampling time.

关 键 词：红外光谱法 煤灰 硫含量 线性标准曲线 相对标准偏差 加标回收率 

分 类 号：TQ533.1[化学工程—煤化学工程]