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Effects of coal interaction with supercritical CO: physical structure

Effects of coal interaction with supercritical CO: physical structure,10.1021/ie9000162,Industrial & Engineering Chemistry Research,Benson B. Gathitu,

Effects of coal interaction with supercritical CO: physical structure   (Citations: 2)
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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 CO 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 CO 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 CO. SEM reveals that interaction of bituminous coal with supercritical CO results in an abundance of carbon structures similar to the maceral collinite.
Journal: Industrial & Engineering Chemistry Research - IND ENG CHEM RES , vol. 48, no. 10, pp. 5024-5034, 2009
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