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Abstract:

A kinetic characterization of the CO2 gasification of chars from Argentinean low-rank coals, subbituminous (SB) and high volatile bituminous (HVB), is performed by isothermal thermogravimetry. Temperatures in the range 1173-1433 K and CO2 concentrations among 50% and 70% v/v are employed. Experimental data obtained for both chars for the whole range of experimental conditions explored were satisfactorily described by a single master curve. Reactivity differences between chars are discussed in terms of carbon content, microporosity and crystallinity of the char carbonaceous part. In addition, potential catalytic effects of inherent minerals on chars gasification reactivity are examined by demineralizing the chars. For the subbituminous char, catalytic effects due to mineral matter content are detected up to 1333 K, whereas at higher temperatures they become considerably less pronounced. For the bituminous char, reactivity seems to depend more on structural and textural features than on catalysis over the whole range of operating conditions. Intrinsic gasification rates for both chars are properly represented by the well-known random capillary and random pore models (RPM). Recent models based on modifications introduced to the latter are also applied and kinetic data description is discussed. © 2001 Elsevier Science B.V. All rights reserved.

Registro:

Documento: Artículo
Título:CO2 gasification of Argentinean coal chars: A kinetic characterization
Autor:Ochoa, J.; Cassanello, M.C.; Bonelli, P.R.; Cukierman, A.L.
Filiación:Departamento de Industrias, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Ciudad Universitaria, Intendente Guiraldes 2620, (1428) Buenos Aires, Argentina
Planta Piloto de Procesos Industriales y Microbiológicos (PROIMI–CONICET), Av. Belgrano y Pje Caseros, (4000) San Miguel de Tucumán, Argentina
Palabras clave:Argentinean coal chars; CO2 gasification kinetics; Coal char gasification; Random pore models; Bituminous coal; Carbon dioxide; Catalyst activity; Coal gasification; Microporosity; Thermogravimetric analysis; Coal char gasification; Charcoal
Año:2001
Volumen:74
Número:3
Página de inicio:161
Página de fin:176
DOI: http://dx.doi.org/10.1016/S0378-3820(01)00235-1
Título revista:Fuel Processing Technology
Título revista abreviado:Fuel Process Technol
ISSN:03783820
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_03783820_v74_n3_p161_Ochoa

Referencias:

  • Hampartsoumian, E., Murdoch, P.L., Pourkashanian, M., Trangmar, D.T., Williams, A., The reactivity of coal chars gasified in a carbon dioxide environment (1993) Combust. Sci. Technol., 92, pp. 105-121
  • Molina, A., Mondragón, F., Reactivity of coal gasification with steam and CO2 (1998) Fuel, 77, pp. 1831-1839
  • Calemma, V., Radovic, L., On the gasification reactivity of Italian Sulcis coal (1991) Fuel, 70, pp. 1027-1030
  • Huang, Y., Yamasita, H., Tomita, A., Gasification reactivities of coal macerals (1991) Fuel Process. Technol., 23, pp. 75-84
  • Kyotani, T., Kubota, K., Cao, J., Yamashita, H., Tomita, A., Combustion and CO2 gasification of coals in a wide temperature range (1993) Fuel Process. Technol., 36, pp. 209-217
  • Mühlen, H.J., Sowa, F., Van Heek, K.H., Comparison of the gasification behaviour of a West and East German brown coal (1993) Fuel Process. Technol., 36, pp. 185-191
  • Ohme, H., Suzuki, T., Mechanisms of CO2 gasification of carbon catalyzed with group VIII metals: 1. Iron-catalyzed CO2 gasification (1996) Energy Fuels, 10, pp. 980-987
  • Beamish, B.B., Shaw, K.J., Rodgers, K.A., Newman, J., Thermogravimetric determination of the carbon dioxide reactivity of char from some New Zealand coals and its association with the inorganic geochemistry of the parent coal (1998) Fuel Process. Technol., 53, pp. 243-253
  • Ye, D.P., Agnew, J.B., Zhang, D.K., Gasification of South Australian low-rank coal with carbon dioxide and steam: Kinetics and reactivity studies (1998) Fuel, 77, pp. 1209-1219
  • Salatino, P., Senneca, O., Masi, S., Gasification of a coal char by oxygen and carbon dioxide (1998) Carbon, 36, pp. 443-452
  • Ochoa, J., Bonelli, P.R., Cassanello, M.C., Cukierman, A.L., Effect of thermal and acid treatments on properties of Argentinean low rank coals (2001) Energy Sources, 23, pp. 383-392
  • Bale, H., Carlson, M., Schobert, H., Thermal modification of the pore structure of a North Dakota lignite (1986) Fuel, 65, pp. 1185-1188
  • Ochoa, J., (1996), PhD thesis, University of Buenos Aires (UBA); Kasaoka, S., Sakata, Y., Tong, C., Kinetic evaluation of the reactivity of various coal chars for gasification with carbon dioxide in comparison with steam (1985) Int. Chem. Eng., 25, pp. 160-175
  • Gutiérrez, M.C., Cukierman, A.L., Lemcoff, N.O., Kinetic study of the reaction of a subbituminous coal char with oxygen (1987) React. Solids, 4, pp. 227-236
  • Zygourakis, K., Sandmann, C.W., Discrete structural models and their application to gas-solid reacting systems (1986) AIChE J., 34, pp. 2030-2040
  • Reyes, S., Jensen, K.F., Modeling of catalytic char gasification (1984) Ind. Eng. Chem. Fundam., 23, pp. 223-229
  • Gavalas, G.R., A random capillary model with application to char gasification at chemically controlled rates (1980) AIChE J., 26, pp. 577-585
  • Bhatia, S.K., Perlmutter, D.D., A random pore model for fluid-solid reactions: Isothermal, kinetic control (1980) AIChE J., 26, pp. 379-385
  • Zolin, A., Jensen, A., Pedersen, L.S., Dam-Johansen, K., A comparison of coal char reactivity determined from thermogravimetric and laminar flow reactor experiments (1998) Energy Fuels, 12, pp. 268-276
  • Tomita, A., Reactivity of char - Effect of coal rank - 14 years later (1991) Carbon, 29, pp. 754-755
  • Ng, S.H., Fung, D.P., Kim, S., Study of the pore structure and reactivity of Canadian coal derived chars (1988) Fuel, 67, pp. 700-706
  • Patrick, J.W., (1995) Porosity in Carbons, , Halsted Press, John Wiley and Sons, New York
  • García, X., Radovic, L., Gasification reactivity of Chilean coals (1986) Fuel, 65, pp. 292-294
  • Bhatia, S.K., Vartak, B.J., Reaction of microsporous solids: The discrete random pore model (1996) Carbon, 34, pp. 1383-1391
  • Gupta, J.S., Bhatia, S.K., A modified discrete random pore model allowing for different initial surface reactivity (2000) Carbon, 38, pp. 47-58
  • Chi, W.K., Perlmutter, D.D., The effect of pore structure on the char-steam reaction (1989) AIChE J., 35, pp. 1791-1802

Citas:

---------- APA ----------
Ochoa, J., Cassanello, M.C., Bonelli, P.R. & Cukierman, A.L. (2001) . CO2 gasification of Argentinean coal chars: A kinetic characterization. Fuel Processing Technology, 74(3), 161-176.
http://dx.doi.org/10.1016/S0378-3820(01)00235-1
---------- CHICAGO ----------
Ochoa, J., Cassanello, M.C., Bonelli, P.R., Cukierman, A.L. "CO2 gasification of Argentinean coal chars: A kinetic characterization" . Fuel Processing Technology 74, no. 3 (2001) : 161-176.
http://dx.doi.org/10.1016/S0378-3820(01)00235-1
---------- MLA ----------
Ochoa, J., Cassanello, M.C., Bonelli, P.R., Cukierman, A.L. "CO2 gasification of Argentinean coal chars: A kinetic characterization" . Fuel Processing Technology, vol. 74, no. 3, 2001, pp. 161-176.
http://dx.doi.org/10.1016/S0378-3820(01)00235-1
---------- VANCOUVER ----------
Ochoa, J., Cassanello, M.C., Bonelli, P.R., Cukierman, A.L. CO2 gasification of Argentinean coal chars: A kinetic characterization. Fuel Process Technol. 2001;74(3):161-176.
http://dx.doi.org/10.1016/S0378-3820(01)00235-1