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Absorption of coal combustion flue gases in ionic liquids using different membrane contactors

ALBO, Jonathan ; LUIS, Patricia ; IRABIEN, Angel

Desalination and water treatment, 2011-03, Vol.27 (1-3), p.54-59 [Periódico revisado por pares]

L'Aquila: Desalination Publications

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Título:
Absorption of coal combustion flue gases in ionic liquids using different membrane contactors
Autor: ALBO, Jonathan ; LUIS, Patricia ; IRABIEN, Angel
Assuntos: Absorption ; Applied sciences ; Atmospheric pollution ; Carbon dioxide ; Ceramic fibers ; Ceramics ; Coal ; Coefficients ; Combustion ; Contactors ; Continental surface waters ; Diffusion coefficients ; Diffusivity ; Emission analysis ; Environmental risk ; Evaporation ; Exact sciences and technology ; Flue gas ; Gases ; General processes of purification and dust removal ; Hollow fiber membranes ; Ionic liquids ; Liquids ; Mass transfer ; Membranes ; Natural water pollution ; Organic solvents ; Pollution ; Polypropylene ; Prevention and purification methods ; Solvents ; Sorption ; Sulfur ; Sulfur dioxide ; Sulphur ; Vapor pressure ; Vapour pressure ; Water treatment and pollution
É parte de: Desalination and water treatment, 2011-03, Vol.27 (1-3), p.54-59
Notas: ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
content type line 23
Descrição: Carbon dioxide (CO sub(2)) and sulfur dioxide (SO sub(2)) are typical gases produced during coal combustion and their emissions have to be controlled and minimized in order to reduce environmental risks. Organic solvents are commonly used as absorption liquids for the chemical absorption of CO sub(2) and SO sub(2), and their use in combination with a membrane device is being studied recently. The volatile character of common solvents produces solvent losses due to their evaporation into the gas stream. Thus, the use of solvents with lower vapor pressure such as ionic liquids as absorption liquids may contribute to the performance of a zero solvent emission process. In the present study, mass transfer of CO sub(2) is studied in a polypropylene hollow fiber membrane contactor when the ionic liquid 1-ethyl-3-methylimidazolium ethyl-sulfate is used as the absorption liquid. Mass transfer coefficients are compared with those obtained with a ceramic hollow fiber contactor for SO sub(2) absorption. The overall mass transfer coefficient takes a value of K sub(overall) = (3.69 plus or minus 0.18) x 10 super(-7) m s super(-1) and K sub(overall) = (3.38 plus or minus 0.09) x 10 super(-6) m s super(-1) in CO sub(2) and SO sub(2) systems, respectively. Main resistance to mass transfer has been found to be the membrane itself. In CO sub(2) absorption a theoretical effective diffusivity was estimated as D sub(eff) = 4.94 x 10 super(-7) m super(2) s super(-1) which differs from diffusivity obtained from experimental results (D sub(eff) = (1.717 plus or minus 0.18) x 10 super(-11) m super(2) s super(-1)).
Editor: L'Aquila: Desalination Publications
Idioma: Inglês

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Absorption of coal combustion flue gases in ionic liquids using different membrane contactors

ALBO, Jonathan ; LUIS, Patricia ; IRABIEN, Angel

L'Aquila: Desalination Publications

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