利用太赫兹技术研究煤炭中的灰分含量与碳含量  

Analysis of Time-Resolved Terahertz Spectroscopy of Ash Contents and Carbon Contents of Coal

作　　者：滕学明[1] 赵昆[1] 赵卉[1] 宝日玛[1] 田璐[1] 

机构地区：[1]中国石油大学(北京)理学院,北京102249

出　　处：《现代科学仪器》2011年第6期19-21,共3页Modern Scientific Instruments

基　　金：教育部新世纪优秀人才支持计划(NCET-08-0841);教育部高等学校博士学科点专项基金(200804250006);中国石油大学(北京)前瞻导向基金

摘　　要：太赫兹时域光谱(THz-TDS)是以飞秒激光为基础的新型的相干远红外光谱测量技术。本文运用THz-TDS技术研究了5种不同种类的煤炭样品在THz波段的光谱特征,结果表明光谱通过各种煤炭样品后有不同的延迟时间和吸收曲线,样品吸收曲线斜率值(K)与样品中灰分含量与碳含量有密切关系。吸收曲线斜率值(K)随灰分含量成指数关系递增,随碳含量成指数关系递减。THz-TDS技术能够分辨煤质的微小差异,可以应用于煤质检测和分析,为煤炭品质和种类的鉴定提供了新的实验方法。Terahertz time domain spectroscopy（THz-TDS） is a new far infrared coherent spectral technique based on femtosecond laser technology.In this paper,the optical characteristics of five kinds of coal reference materials in 0.2-1.5 THz have been investigated through THz-TDS.Experimental results showed that the time delay and absorption spectrum of those five materials are totally different.The slope values of absorption spectrum K strongly depend on the types of coal reference materials with different ash and carbon contents.After careful fitting of the data,the K could be seen to exponential increase and exponential decrease with ash and carbon contents,respectively.It is demonstrated that the THz-TDS is highly sensitive to minor changes of coal types and can be used in identification of coal quality and type research.

关 键 词：太赫兹 煤炭 灰分含量 碳含量 

分 类 号：O433.1[机械工程—光学工程]