Study of Colombian coals using photoacoustic Fourier transform infrared spectroscopy

✍ Scribed by Jorge A. Orrego-Ruiz; Rafael Cabanzo; Enrique Mejía-Ospino

• Publisher: Elsevier Science
• Year: 2011
• Tongue: English
• Weight: 449 KB
• Volume: 85
• Category: Article
• ISSN: 0166-5162
• DOI: 10.1016/j.coal.2010.12.013

✦ Synopsis

Five of the most important Colombian coals were studied using Photoacoustic Fourier transform infrared (PA-FTIR) spectroscopy. The PA-FTIR spectra were used to obtain structural parameters and to determine the analytical potential of this technique. The molecular structural parameters, CH 2 /CH 3 , f a , H al /H ar , and (R/C) u were correlated with fixed carbon contained in the samples to determine aliphatic hydrogen, H al , and the aromatic hydrogen, H ar in coals studied here. These parameters enabled the determination of aromaticity, f a , which was found to be between 0.66 and 0.98. The aliphatic and aromatic regions were considered between 3005-2760 cm -1 and 912-670 cm -1 , respectively. Finally, using the molecular structural parameters, the grade of maturation (rank) of coal samples studied was determined.