Effect of the Temperature in Water Adsorption onto Sub-Bituminous Coal

• Esteban A. Taborda ^[1] ; Camilo A. Franco Ariza ^[1] ; William A. Jurado ; Nashaat N. Nassar ^[2] ; Farid B. Cortés ^[2]
  1. [1] Universidad Nacional de Colombia

     Universidad Nacional de Colombia

     Colombia

     
  2. [2] University of Calgary

     University of Calgary

     Canadá

     
• Localización: Boletín del Grupo Español del Carbón, ISSN-e 2172-6094, Nº. 38, 2015, págs. 2-7
• Idioma: inglés
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• Resumen

  • 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. 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.