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Effects of coal interaction with supercritical CO2 / Benson B. Gathitu in Industrial & engineering chemistry research, Vol. 48 N° 10 (Mai 2009) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 48 N° 10 (Mai 2009) . - pp. 5024–5034 Titre : Effects of coal interaction with supercritical CO2 : physical structure Type de document : texte imprimé Auteurs : Benson B. Gathitu, Auteur ; Wei-Yin Chen, Auteur ; Michael McClure, Auteur Année de publication : 2009 Article en page(s) : pp. 5024–5034 Note générale : Chemical engineering Langues : Anglais (eng) Mots-clés : Coal  Gas  sorption  technique  Scanning  electron  microscope  CO2 Résumé : It is known that polar solvents swell coal, break hydrogen-bonds in the macromolecular structure, and enhance coal liquefaction efficiencies. The effects of drying, interaction with supercritical CO2 and degassing on the physical structure of coal have been studied using gas sorption technique and a scanning electron microscope (SEM). Both drying and interaction with supercritical CO2 drastically change the micropore and mesopore surface area, absolute volume, and volume distribution in both bituminous coal and lignite. Degassing removes debris in the pore space which allows for better analysis of the changes in the morphology that were induced by drying and exposure to supercritical CO2. SEM reveals that interaction of bituminous coal with supercritical CO2 results in an abundance of carbon structures similar to the maceral collinite. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie9000162 [article] Effects of coal interaction with supercritical CO2 : physical structure [texte imprimé] / Benson B. Gathitu, Auteur ; Wei-Yin Chen, Auteur ; Michael McClure, Auteur . - 2009 . - pp. 5024–5034. Chemical engineering Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 48 N° 10 (Mai 2009) . - pp. 5024–5034 Mots-clés : Coal  Gas  sorption  technique  Scanning  electron  microscope  CO2 Résumé : It is known that polar solvents swell coal, break hydrogen-bonds in the macromolecular structure, and enhance coal liquefaction efficiencies. The effects of drying, interaction with supercritical CO2 and degassing on the physical structure of coal have been studied using gas sorption technique and a scanning electron microscope (SEM). Both drying and interaction with supercritical CO2 drastically change the micropore and mesopore surface area, absolute volume, and volume distribution in both bituminous coal and lignite. Degassing removes debris in the pore space which allows for better analysis of the changes in the morphology that were induced by drying and exposure to supercritical CO2. SEM reveals that interaction of bituminous coal with supercritical CO2 results in an abundance of carbon structures similar to the maceral collinite. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie9000162