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The effect of pulverised coal’s devolatilisation conditions on char physical characteristics
Efecto de las condiciones de desvolatilización de carbones pulverizados sobre las características físicas de carbonizados
DOI:
https://doi.org/10.15446/ing.investig.v27n1.14776Keywords:
porosity, density, specific surface area, particle size, char, pulverised coal (en)porosidad, densidad, area superficial específica, tamaño de partícula, carbonizado, carbón pulverizado (es)
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This study examined the effect of pulverised coal fuel devolatilisation conditions on char’s physical characteristics. A devolatilisation system was thus designed and built where three bituminous coals were devolatilised at three different times (100, 150 and 300 ms) and at three temperatures (900°C, 1,000°C and 1,100°C). The resulting char was characterised regarding porosity, pore volume, surface area and particle size distribution. It was found that char porosity and pore volume increased with devolatilisation temperature and time. Devolatilisation operation conditions did not produce any effect on char’s specific surface area. However, char particle size was bigger than original coal size.
Se estudia el efecto de las condiciones de operación de des volatilización de carbón pulverizado sobre las características físicas de carbonizados. Para este estudio se diseñó y construyó un sistema de desvolatilización en el que se desvolatilizaron tres carbones bituminosos a tres tiempos (100, 150 y 300 ms) y tres temperaturas (900, 1.000 y 1.100 °C). Los carbonizados se caracterizaron respecto de su porosidad, volumen de poro, área superficial y distribución de tamaño de partícula. Se encontró que la porosidad y el volumen de poro de los carbonizados se reducen al aumentar la temperatura y el tiempo de desvolatilización. De igual manera, se halló que las condiciones de operación de desvolatilización no producen ningún efecto sobre el área superficial de los carbonizados. Sin embargo, respecto de la distribución de tamaño de partícula, las de carbonizado presentaron mayores tamaños que sus respectivos carbones sin tratar.
References
Allen, T., Particle size measurement: Powder sampling and particle size measurement., Powder Technology Series, Fifth Edition 1, Chapman & May, 1998. DOI: https://doi.org/10.1016/B978-044451564-3/50003-6
Arenillas, A., Influencia del proceso de desvolatilización sobre la reducción de emisiones de óxidos de nitrógeno en la combustión del carbón., tesis presentada a la Universidad de Oviedo, Departamento de Ingeniería Química y Tecnología del Medio Ambiente, Oviedo, España, para optar al grado de Doctor, 1998.
Arenillas, A., Rubiera, F., Parra, J.B. and Pis, J.J., A comparison of ASA values determined by different methods., Carbon, Vol. 40, 2002, pp. 1381-1383. DOI: https://doi.org/10.1016/S0008-6223(02)00128-8
Brunauer, S., Emmett, H. and Teller, E., Adsorption of gases in multimolecular layers., Journal of American Chemical Society, Vol. 60, 1938, pp. 309-319. DOI: https://doi.org/10.1021/ja01269a023
CaiI, H-Y., Guell, A.J., Chatzakis, I.N., Lim, J.-Y., Dugwell, D.R. and Kandiyoti, R., Combustion reactivity and morphological change in coal chars: effect of pyrolysis temperature, heating rate and pressure., Fuel, Vol. 75, No. 1, 1996, pp.15-24. DOI: https://doi.org/10.1016/0016-2361(94)00192-8
Cloke, M. and Lester, E., Characterization of coals for combustion using petrographic analysis: a review., Fuel, Vol. 73, No. 3, 1994, pp.315-320. DOI: https://doi.org/10.1016/0016-2361(94)90081-7
Dormant, L. and Adamson, A., Application of the BET equation to heterogeneous surfaces., Journal of Colloid and Interface Science, Vol. 38, No. 1, 1972, pp. 285-289. DOI: https://doi.org/10.1016/0021-9797(72)90244-5
Ecocarbón - Universidad Pontificia Bolivariana., Calderas a carbón, Editorial Universidad Pontificia Bolivariana, Medellín, Colombia, 1998.
Jones, R.B., McCourt, C.B., Morley, C. and King, K., Maceral and rank influences on the morphology of coal char., Fuel, Vol. 64, 1985, pp. 1460-1467. DOI: https://doi.org/10.1016/0016-2361(85)90351-5
Lecloux, A. and Pirard, J.P., The importance of standard isotherms in the analysis of adsorption isotherms for determining the porous texture solids., Journal of Colloid and Interface Science, Vol. 70, No. 2, 1979, pp. 265-281. DOI: https://doi.org/10.1016/0021-9797(79)90031-6
Parfitt, G.D., Sing, K.S.W. and Urwin, D., The analysis of the nitrogen adsorption isotherms of microporous materials., Journal of Colloid and Interface Science, Vol. 53, No. 2, 1975, pp. 187-193. DOI: https://doi.org/10.1016/0021-9797(75)90005-3
Petersen, H., Morphology, formation and palaeo environmental implications of naturally formed char particles in coals and carbonaceous mudstones., Fuel, Vol. 77, No. 11, 1998, pp. 1177-1183. DOI: https://doi.org/10.1016/S0016-2361(98)00021-0
Rawle, A., Basic principles of particle size analysis., Technical Paper, Malvern Instruments, 1996.
Rojas, A.F., Estudio cinético de la combustión del char de carbón pulverizado., tesis presentada a la Universidad del Valle, para optar al grado de Doctor en Ingeniería, Cali, Colombia, 2005.
Rubiera, F., Parra, J.B., Arenillas, A., Hall, S.T., Shah, C.L. and Pis, J.J., Textural properties in density-separated coal fractions., Fuel, Vol. 78, 1999, pp. 1631-1637. DOI: https://doi.org/10.1016/S0016-2361(99)00109-X
Ruiz, B., Parra, J.B., Pajares, J.A. and Pis, J.J., Study of porous development in pyrolysis chars obtained from a low-volatile coal., Journal of Analytical and Applied Pyrolysis, Vol. 58-59, 2001, pp. 873-886. DOI: https://doi.org/10.1016/S0165-2370(00)00189-3
Senel, I.G., Guruz, A., and Yucel, H., Characterization of pore structure of Turkish coals., Energy & Fuels, Vol. 21, 2001, pp. 331-338. DOI: https://doi.org/10.1021/ef000081k
Shu, X. y Xu, X., Study on morphology of chars from coal pyrolysis., Energy & Fuels, Vol. 15, 2001, pp. 1347-1353. DOI: https://doi.org/10.1021/ef000202g
Urhán, R. M., Mejora de la eficiencia de la combustión de carbones utilizados en el Valle del Cauca mediante un estudio previo de su reactividad., Informe final presentado a ECOCARBON - COLCIENCIAS, Universidad del Valle, Cali, Colombia, 2000.
Valentim, B., Lemos de Sousa, M.J., Abelha, P., Boa vida, D. and Gulyurlu, I., Relation between the petrographic composition of coal and the morphology of pyrolysis char produced in fluidized bed., Energy & Fuels, Vol. 18, 2004, pp. 611-618. DOI: https://doi.org/10.1021/ef034016x
Walker, P.L., Verna, S.K., Rivera-Utrilla, J. and Davis, A., Densities, porosities and surface areas of coal macerals as measured by their interaction with gases., vapors and liquids, Fuel, Vol. 67, No. 12, 1988, pp.1615-1623. DOI: https://doi.org/10.1016/0016-2361(88)90204-9
Wang, Q., Yao, H., Yu, D., Dai, L, and Xu, M., Emission behavior of particulate matter during co-combustion of coal and biomass in a drop tube furnace., Energy & Fuels, [available online in American Chemical Society], 2007. DOI: https://doi.org/10.1021/ef060410u
Washington, C., Particle size analysis in pharmaceutics and other industries: theory and practice., Ellis Horwood Series, 1996.
Webb, P. and Orr, C., Analytical methods in fine particle technology, Micrometrics Instrument Corporation, Norcross, GA USA, 1997.
Yu, J. and Mingchuan Zhang, A simple method for predicting the rate constant of pulverized-coal pyrolysis at higher heating rate., Energy & Fuels, Vol. 17, 2003a, pp. 1085-1090. DOI: https://doi.org/10.1021/ef020281r
Yu, J., Lucas, J., Strezov, V. and Wall, T., Swelling and char structures from density fractions of pulverized coal., Energy & Fuels, Vol. 17, 2003, pp. 1160-1174. DOI: https://doi.org/10.1021/ef030022h
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Copyright (c) 2007 Andrés Felipe Rojas González, Juan Manuel Barraza Burgos
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