Optical property of biodiesel and its base stock in terahertz region

doi:10.1007/s12200-012-0227-4

Front Optoelec

2012, Vol. 5

Issue (2) : 214-217 https://doi.org/10.1007/s12200-012-0227-4

RESEARCH ARTICLE

Optical property of biodiesel and its base stock in terahertz region

Hui ZHAO¹, Kun ZHAO^1,2(

), Lu TIAN¹, Qing MIAO¹, Hao NI¹

1. Laboratory of Optic Sensing and Detecting Technology, College of Science, China University of Petroleum, Beijing 102249, China; 2. State Key Laboratory of Heavy Oil Processing, China University of Petroleum, Beijing 102249, China

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Abstract

Biodiesel is the product of catalysed transesterification reaction, in which fatty acid is transformed to fatty acid methyl ester (FAME), named biodiesel. The frequency-dependent absorption and refractive characters of biodiesels and its base stocks have been researched in the spectral range of 0.2-1.5 THz by terahertz time-domain spectroscopy (THz-TDS). The biodiesels showed higher absorption value than those of its base stocks because of the concomitant, and the increasing of absorption coefficients of three biodiesels differed with the different transesterification technology. The results suggested that THz-TDS can be a promising method to the quality control and ester transfer efficiency analysis of biodiesel.

Keywords terahertz time-domain spectroscopy (THz-TDS) biodiesel(BD) fatty acid methyl ester (FAME)

Corresponding Author(s): ZHAO Kun,Email:zhk@cup.edu.cn

Issue Date: 05 June 2012

Cite this article:

Hui ZHAO,Kun ZHAO,Lu TIAN, et al. Optical property of biodiesel and its base stock in terahertz region[J]. Front Optoelec, 2012, 5(2): 214-217.

URL:

https://academic.hep.com.cn/foe/EN/10.1007/s12200-012-0227-4
https://academic.hep.com.cn/foe/EN/Y2012/V5/I2/214

Fig.1 THz pulses of reference, BDs and its base stocks

Fig.2 Absorption coefficients of samples in 0.2-1.6 THz

Fig.3 Calculated absorption characters of FAMEs and FAs with carbon number from 12 to 18 at 0.2-1.6 THz

Fig.4 Refractive indexes of samples in 0.2-1.6 THz

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