Characterization of Heavy Distillation Cuts Using Fourier Transform Infrared Spectrometry: Proof of Concept

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• 作者：M. C. Sánchez-Lemus ; F. F. Schoeggl ; S. D. Taylor ; S. I. Andersen ; M. M. Mapolelo ; S. C. MahavadiH. W. Yarranton
• 刊名：Energy & Fuels
• 出版年：2016
• 出版时间：December 15, 2016
• 年：2016
• 卷：30
• 期：12
• 页码：10187-10199
• 全文大小：893K
• ISSN：1520-5029

文摘

Fourier transform infrared spectrometry (FTIR) spectra were measured for 16 distillation cuts obtained from two bitumens using a deep vacuum fractionation apparatus. Three regions of the spectra were deconvoluted into peaks each associated with a known type of vibration: (1) aliphatic C–H stretching in the 2800–3000 cm^–1 region, (2) aliphatic C–H scissoring/symmetric deformation in the 1350–1400 cm^–1 region, and (3) aromatic C–H out-of-plane bending in the 680–900 cm^–1 region. The distribution of chemical structures in the oils were assessed, and preliminary correlations were identified between measured physical properties (density, atomic H/C ratio, and molecular weight) and the quantified peak areas obtained from the FTIR spectra. A preliminary method was proposed to generate physical property distribution data for crude oils based on distillation and FTIR data. The method predicted the density, atomic H/C ratio, and molecular weight of the distillation cuts, with average deviations less than 0.8, 1.4, and 16%, respectively. Note that the method was tested on the same cuts used to generate the correlations because there were insufficient data for an independent test.