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Abstract:

The chemical, structural, and textural-morphological features of low rank coals, subbituminous and high volatile bituminous, from Argentinean minefields were examined. Features modifications arising from thermal treatment and mineral matter removal were analyzed and related to chars reactivity for CO2 gasification. For this purpose, proximate, ultimate, and ash analyses, X-ray diffraction, mercury intrusion porosimetry, adsorption of CO2 (298 K), and scanning electronic microscopy were performed on the original coals as well as on the raw and demineralized char samples. Thermal treatment increased the coals structural ordering and affected pores of any size, leading to bimodal macro-mesopore size distributions and to a pronounced development of micropores. Disarrangement of the structures took place as a result of mineral matter removal altering mainly macroand mesopores, thus producing unimodal distributions. Structural changes occasioned by thermal treatment and demineralization were also reflected in modifications of the surface fractal dimensions estimated from mercury porosimetry data. Reactivity of chars for gasification was significantly affected by demineralization not only due to removal of metals, likely responsible for catalytic effects, but also induced by the structural modifications. Copyright © 2001 Taylor & Francis.

Registro:

Documento: Artículo
Título:Effect of thermal and acid treatments on properties of Argentinean low rank coals
Autor:Ochoa, J.; Bonelli, P.R.; Cassanello, M.C.; Cukierman, A.L.
Filiación:Pinmate, Departamento de Industrias, Facultad de Ciencias Exactas y Naturales, Ciudad Universitaria, Buenos Aires, Argentina
Pinmate-Departamento de Industrias, Fac. Ciencias Exactas y Naturales, Ciudad Universitaria, 1428 Buenos Aires, Argentina
Palabras clave:Coal char demineralization; Coal char gasification; Coal char properties; Fractals; Gas adsorption; Gasification; Heat treatment; Pore size; Porosimeters; Scanning electron microscopy; Volatile organic compounds; X ray diffraction analysis; Coal char demineralization; Coal
Año:2001
Volumen:23
Número:4
Página de inicio:383
Página de fin:392
Título revista:Energy Sources
Título revista abreviado:Energy Sources
ISSN:00908312
CODEN:EGYSA
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00908312_v23_n4_p383_Ochoa

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Citas:

---------- APA ----------
Ochoa, J., Bonelli, P.R., Cassanello, M.C. & Cukierman, A.L. (2001) . Effect of thermal and acid treatments on properties of Argentinean low rank coals. Energy Sources, 23(4), 383-392.
Recuperado de https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00908312_v23_n4_p383_Ochoa [ ]
---------- CHICAGO ----------
Ochoa, J., Bonelli, P.R., Cassanello, M.C., Cukierman, A.L. "Effect of thermal and acid treatments on properties of Argentinean low rank coals" . Energy Sources 23, no. 4 (2001) : 383-392.
Recuperado de https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00908312_v23_n4_p383_Ochoa [ ]
---------- MLA ----------
Ochoa, J., Bonelli, P.R., Cassanello, M.C., Cukierman, A.L. "Effect of thermal and acid treatments on properties of Argentinean low rank coals" . Energy Sources, vol. 23, no. 4, 2001, pp. 383-392.
Recuperado de https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00908312_v23_n4_p383_Ochoa [ ]
---------- VANCOUVER ----------
Ochoa, J., Bonelli, P.R., Cassanello, M.C., Cukierman, A.L. Effect of thermal and acid treatments on properties of Argentinean low rank coals. Energy Sources. 2001;23(4):383-392.
Available from: https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00908312_v23_n4_p383_Ochoa [ ]