Abstract
The presence of water in coal presents a technological challenge for its industrial use in energetic processes. Therefore, this study aims to study the temperature effect on the water adsorption onto coals at 21, 30, 40 and 50°C. A Colombian bituminous coal was used as sample. The coal was characterized by nitrogen adsorption at 77 K (SBET), Scanning electron microscopy (SEM), Fourier transform infrared (FT-IR) spectroscopy, elemental analysis (C-H-N elemental). The results showed that the water uptake increased as the vapor pressure increased. The Talu and Meunier model [1] was used to fit the adsorption isotherms, and the mean square root error (MSRE%) was lower than 10%. Additionally, the Gibbs free energy was found to have negative values, which corroborates the spontaneous adsorption process.
Publisher
Universidad Nacional de Colombia
Reference39 articles.
1. Talu, O. and Meunier, F., Adsorption of associating molecules in micropores and application to water on carbon, AIChE journal, 42, pp. 809-819, 1996. DOI: 10.1002/aic.690420319
2. Rutledge, D., Hubbert's peak, the coal question, and climate change, Excel Workbook (permission is given to copy this work provided that attribution is given and the following web link is included). [Online], 2007. Available at: http://rutledge.caltech.edu,
3. Shafiee, S. and Topal, E., When will fossil fuel reserves be diminished?, Energy Policy, 37, pp. 181-189, 2009. DOI: 10.1016/j.enpol.2008.08.016
4. Castro, J., Perspectivas de la demanda energética global, Petrotecnia, pp. 54-70, 2011.
5. Rempel, H., Schmidt, S. and Schwarz-Schampera, U., Reserves, resources and availability of energy resources, Hannover, Bundesanstalt für Geowissenschaften und Rohstoffe (BGR). [Online], 2009. Available at: www.bgr.bund.de.
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