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Thermal and catalytic coliquefaction of a Colombian coal with a low density polyethylene
Colicuefacción térmica y catalítica de un carbón colombiano con un residuo de polietileno de baja densidad
DOI:
https://doi.org/10.15446/ing.investig.v30n1.15202Keywords:
coal, low density polyethylene waste, coliquefaction, thermal, catalytic (en)carbón, residuo de polietileno de baja densidad, colicuefacción, térmica, catalítica (es)
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Thermal and catalytic co-liquefaction of coal with organic waste is aimed at increasing the process efficiency and decreasing its cost as the presence of organic waste can supply the hydrogen required for the reaction. Thermal and catalytic coliquefaction of coal from La Yolanda colliery with low density polyethylene waste (LDPE) was carried out using hydrogen-donor solvent (tetraline) and two catalysts (ruthenium chloride and nickel-molybdenum on aluminium). A batch reactor was used at 380°C, 400°C and 420°C. Results revealed greater than 90% conversion for thermal coliquefaction of coal/LDPE without tetraline, whereas results showed that conversion decreased with temperature when using tetraline. Oil and preasphalthene yields, obtained at 400°C and 420°C, were higher using tetraline than those without it. Both catalysts improved conversion and oil selectivity. However, selectivity results were no higher than those obtained when only coal was used and LDPE was 380°C.
La colicuefacción térmica y catalítica de carbones con residuos orgánicos busca incrementar la eficiencia del proceso y disminuir sus costos ya que la presencia del residuo orgánico puede suplir el hidrógeno requerido de la reacción. En este trabajo se realizaron colicuefacciones térmicas y catalíticas de un carbón de la mina La Yolanda con un residuo de polietileno de baja densidad (RPBD) en presencia de un solvente donante de hidrógeno (tetralina) y de dos catalizadores —cloruro de rutenio y níquel-molibdeno— soportado en alúmina. Se usó un reactor batch a las temperaturas de 380, 400 y 420 °C. Los resultados mostraron conversiones mayores a 90% para la colicuefacción térmica carbón/RPBD sin tetralina, mientras que en su presencia presentaron decrecimiento de la conversión con la temperatura. Los rendimientos de aceites y preasfáltenos obtenidos a 400 y 420 °C fueron mayores en presencia de tetralina, comparada con los obtenidos en su ausencia. Ambos catalizadores mejoraron la conversión y la selectividad hacia aceites. Sin embargo, los resultados de selectividad no fueron mayores a los obtenidos cuando solamente se utilizó carbón y RPBD a 380 °C.
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Copyright (c) 2010 Juan Manuel Barraza Burgos, José Moreno, Fiderman Machuca Martínez, Alberto Bolaños
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