2018 - Sustainable Industrial Processing Summit & Exhibition
4-7 November 2018, Rio Othon Palace, Rio De Janeiro, Brazil
| Screening of [DCN] and [TF<sub>2</sub>N]-based Promising Ionic Liquids for Carbon Dioxide Capture: Solubility and Thermodynamic Modeling Amr Henni1; Mohamed Zoubeik1; 1UNIVERSITY OF REGINA, Regina, Canada; PAPER: 364/Molten/Regular (Oral) SCHEDULED: 11:45/Tue./Bossa (150/3rd) ABSTRACT: Carbon dioxide (CO<sub>2</sub>) capture is the key to global warming. Advances in CO<sub>2</sub> capture technology are being sought by industries in an attempt to revolutionize the energy sector and divert some of the CO<sub>2</sub> being released from industrial emissions onto greener paths. Among the endless capture technologies, the use of ionic liquids has gained tremendous popularity as a novel environmentally and energy efficient solution. Three different ionic liquids were investigated for their ability to capture CO<sub>2</sub>. With the aid of a gravimetric microbalance, their capacity to absorb carbon dioxide was determined experimentally. The ionic liquids explored in this study were a dicyanamide [DCN]-based solvent, and two bis (trifluoro methylsulfonyl)imide [TF<sub>2</sub>N] based solvents. Solubilities were examined at readings of 313.15, 323.15 and 333.15K and over a pressure range up to 20 bar. Experimental densities were also measured, and the Henry's law constants, entropy and the enthalpy values were calculated and reported. Three thermodynamic models were used to correlate the data. The Non-Random Two-Liquid (NRTL) model and the Peng-Robinson and Soave-Redlich-Kwong equations of state correlated the data quite accurately. The best ionic liquid in his study, [TDC][TF<sub>2</sub>N], was found to be akin to some popular ionic liquids such as [hmim][TF<sub>2</sub>N], which makes it an attractive physical solvent for CO<sub>2</sub> removal processes. |
