Chemical Research in Chinese Universities ›› 2015, Vol. 31 ›› Issue (3): 352-356.doi: 10.1007/s40242-015-4364-3

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Evaluation of Oil Yield of Oil Shale by Infrared Spectrometry Coupled with Ultrasound-assisted Extraction

ZHAO Zhenying1, LIN Jun1, YU Yong1, HOU Chuanbin2, SUN Yuyang1   

  1. 1. College of Instrumentation & Electrical Engineering, Jilin University, Changchun 130061, P. R. China;
    2. College of Construction Engineering, Jilin University, Changchun 130061, P. R. China
  • Received:2014-09-29 Revised:2015-02-16 Online:2015-06-01 Published:2015-03-30
  • Contact: LIN Jun E-mail:lin_jun@jlu.edu.cn
  • Supported by:

    Supported by the National Innovation Project of Production-Study-Research-Application of China(No.OSR-02-04), the Research Fund for the Doctoral Program of Higher Education of China(No.20130061110068) and the National Natural Science Foundation of China(No.21207047).

Abstract:

The oil yield of oil shale was evaluated by Fourier transform infrared(FTIR) spectrometry coupled with ultrasound-assisted extraction. The extraction conditions, including the amount of sample, extraction time and extraction temperature, were examined and optimized. Twenty-four oil shale samples were collected and divided into calibration set and prediction set randomly with a ratio of 2:1. The oil yields of all the samples were determined by the routine method(low-temperature retorting) for reference. The linear regression(LR) equations of oil yield vs. the total area of the spectrum peaks in a wavenumber range of 3100-2800 cm-1 as well as the sum of absorbance of three absorption peaks(2855, 2927 and 2955 cm-1), and the multiple linear regression(MLR) model of oil yield vs. the absorbances of the three absorption peaks were constructed with the samples in calibration set and applied to the evaluation of the oil yields of the samples in prediction set, respectively. The results show that the MLR model provides more accurate predictions than the other LR two equations. The determination coefficient(Rp2), the root-mean-square error of prediction(RMSEP) and the residual prediction deviation(RPD) of the MLR model are 0.9616, 0.6458 and 3.6, respectively. The present method is a rapid and effective alternative to the routine low-temperature retorting method.

Key words: Oil shale, Oil yield, Ultrasound-assisted extraction, Infrared spectroscopy, Multiple linear regression