IEC 7 |
| Richard D. Noble1, P. Scovazzo1, C. A. Koval2, and J. Kieft2. (1) Department of Chemical Engineering, University of Colorado, Boulder, CO 80309-0424, (2) Department of Chemistry and Biochemistry, University of Colorado, Boulder, CO 80309-0215 |
| CO2, N2 and O2 solubility isotherms have been measured in several ionic liquids including [bmim][PF6], [emim][Tf2N], [emim][CF3SO3], and [thtdp][Cl]. The measurements were conducted at 300 K for both dry and humidified ionic liquids. CO2 was generally 10 times more soluble than the other gases and there was little effect of humidity on the values measured. Pure component flux experiments were conducted. The [emim][Tf2N] demonstrated a facilitation effect with a high permeability (approx. 1400 barrers) at a low CO2 feed pressure (5 kPa) with a decrease to 1000 barrers at 20 kPa. CO2/N2 ideal selectivity was 40 at 5 kPa pressure. The selectivity vs. permeability values obtained were above the "line of death" on a Robeson plot in comparison with polymer membranes for the same separation. |
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Separations Science Approaches to Carbon Management (Cosponsored by Separation Science & Technology Subdivision)
9:00 AM-11:55 AM, Sunday, March 23, 2003 Convention Center -- Room 393, Oral
Division of Industrial and Engineering Chemistry |