Publicado

2016-01-01

Effect of the temperature in adsorption phenomena of water onto Sub-Bituminous coal

Efecto de la temperatura en el proceso de adsorción de agua en Carbón sub-bituminoso colombiano

Palabras clave:

Adsorption, Coal, Isotherm, Water (en)
Adsorción, Carbón, Isoterma, Agua (es)

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Autores/as

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.
La presencia de agua en carbones presenta un reto tecnológico para su uso industrial en procesos energéticos. Por tal motivo, este estudio pretende analizar el efecto de temperatura en la adsorción de agua en carbones a 21, 30, 40 y 50°C. Un carbón sub-bituminoso Colombiano fue usado como muestra. El carbón fue caracterizado por adsorción de nitrógeno a 77K (SBET), Microscopía electrónica de barrido (SEM), Espectroscopia infrarroja por transformada de Fourier (FT-IR), análisis elemental (C-H-N). Los resultados muestran que la captura de agua se incrementa a medida que la presión de vapor aumenta. El modelo Talu & Meunier [1] fue utilizado para ajustar las isotermas de adsorción, presentando un buen ajuste. MSRE% menor al 10%. Adicionalmente, se calculó la energía libre de Gibbs obteniendo valores negativos, lo cual corrobora el proceso espontáneo de adsorción.

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Cómo citar

Efecto de la temperatura en el proceso de adsorción de agua en Carbón sub-bituminoso colombiano. (2016). Boletín De Ciencias De La Tierra, 39, 57-64. https://doi.org/10.15446/rbct.n39.54127

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