Journal
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
Volume 48, Issue 23, Pages 10650-10656Publisher
AMER CHEMICAL SOC
DOI: 10.1021/ie9010244
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- Dutch EET (Ecology, Economy and Technology) [EETK02040]
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The potential of room-temperature ionic liquids (RTILs) in separating ethylene from ethane is investigated. The absorption of olefins is enhanced by chemical absorption via pi-complex formation with a transition-metal cation added to a standard RTIL. The effects of the ionic liquid structure of silver-based RTILs that contain Ag(I) salts (AgNO(3), Ag[TfO], and Ag[Tf(2)N]) on gas absorption and solvent stability are investigated. The absorption isotherms of C(2)H(4) and C(2)H(6) into Standard RTILs and designed silver-based RTILs were measured with a gravimetric balance between 303 and 333 K and up to 10 bar. C(2)H(4) absorption was chemically enhanced in the silver-based RTILs and was considerably higher than that in the standard RTILs. Absorption of C(2)H(6) in the silver-based RTILs is based on physical interactions only. The olefin/paraffin selectivity at a pressure of I bar was similar to 30-50 higher in the silver-based RTILs than in standard ionic liquids.
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