Identification of pour point depressant by terahertz time-domain spectroscopy

被引：0
|
作者：
Zhao H. [1 ,2 ]
Tian L. [2 ]
Zhao K. [1 ,2 ,4 ]
Zhou Q. [3 ]
Shi Y. [3 ]
Zhao D. [3 ]
Zhao S. [2 ]
Zhang C. [3 ]
机构：
[1] State Key Laboratory of Heavy Oil Processing, China University of Petroleum
[2] Laboratory of Optic Sensing and Detecting Technology, China University of Petroleum
[3] Key Laboratory of Terahertz Optoelectronics, Department of Physics, Capital Normal University
[4] International Center for Materials Physics, Chinese Academy of Sciences
来源：
Chinese Optics Letters | 2011年 / 9卷 / SUPPL. 1期
关键词：
Chemical compositions - Frequency-dependent absorption - Middle infrared - Pour point depressants - Spectral feature - Spectral range - Terahertz time domain spectroscopy - Testing time;
D O I：
10.3788/COL201109.S10505
中图分类号：
学科分类号：
摘要：
The frequency-dependent absorption coefficients and refractive indexes of three selected pour point depressants (PPDs) are extracted within the spectral range of 0.2-2.5 THz using terahertz time-domain spectroscopy (THz-TDS). The selected PPDs are also characterized by the middle-infrared spectrum. The experimental results reveal that PPD is more sensitive in the THz range than that in the middle-infrared range. Moreover, the different compositions of PPD can be identified according to their different spectral features in the THz range. Due to its properties of better repeatability, shorter testing time, and easier operation, THz-TDS can be used as a complement for identifying the chemical compositions of PPD. © 2011 Chinese Optics Letters.
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