Publicado

2016-07-01

Glycerol effect on the inhibition of spontaneous combustion of subbituminous coal

Efecto del glicerol en la inhibición de la combustión espontánea de carbón sub-bituminoso

DOI:

https://doi.org/10.15446/rbct.n40.55999

Palabras clave:

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

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Factors favoring the phenomenon of spontaneous combustion in coal mainly depend on the intrinsic properties such as coal particle size, moisture content, among others; the medium in which it is located and how it is stored. Consistent with this, the objective of this work is to evaluate the effect of glycerol on the inhibition of self-combustion as water re-adsorption reducer through the addition of glycerol in different amounts (4, 8, 18 and 28% wt). The coal sample was extracted from the Córdoba department, Colombia. Incipient impregnation method was used to perform the addition of glycerol to the desired quantities. Characterizing the coal samples was performed by: TGA-DTG, nitrogen adsorption at -196 °C, C-H-N-O, FTIR, and SEM. The TGA of the coals evaluated in an air atmosphere, show changes in combustion properties of each sample. Di ignition index is reduced as the coal is impregnated with glycerol, obtaining its lowest value for 8wt% of glycerol. The effect of glycerol in inhibiting the spontaneous combustion of coal is exposed in the adsorption equilibrium; the sample with 8wt% glycerol shows the highest reduction of water adsorption in coal validating the proposed technology as inhibitor agent spontaneous combustion phenomenon found in Colombian coal.
Factores que favorecen el fenómeno de auto-combustión del carbón depende principalmente de las propiedades intrínsecas, tales como tamaño de partícula, contenido de humedad, entre otros; el medio en el que se encuentra y cómo se almacena. De acuerdo con esto, el objetivo de este trabajo es evaluar el efecto del glicerol en la inhibición de auto-combustión del carbón como reductor de re-adsorción de agua, mediante la adición de glicerol en diferentes cantidades (4, 8, 18 y 28% en peso). El método de impregnación incipiente se utilizó para adicionar el glicerol a las cantidades deseadas. La caracterización de las muestras se realizó mediante: TGA-DTG, adsorción de nitrógeno a -196 ° C, C-H-N-O, FTIR, y SEM. El TGA de los carbone refleja cambios en las propiedades de combustión de cada muestra. El índice de ignición Di presenta su valor más bajo para la muestra con 8% en peso. El efecto del glicerol en la inhibición de la combustión espontánea del carbón está expuesto en el equilibrio de adsorción; la muestra con 8% en peso de glicerol presenta la mayor reducción de la adsorción de agua en el carbón validando la tecnología propuesta como agente inhibidor del fenómeno de auto-combustión en carbones colombianos.

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Cómo citar

Taborda Acevedo, E. A., Jurado Valencia, W. J., & Cortés, F. B. (2016). Efecto del glicerol en la inhibición de la combustión espontánea de carbón sub-bituminoso. Boletín De Ciencias De La Tierra, 40, 64-74. https://doi.org/10.15446/rbct.n40.55999

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