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Absorption of Carbon Dioxide into Ionic Liquid of 2-Hydroxy Ethylammonium Lactate

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Absorption of carbon dioxide into organic solvents such as DMA, NMP, DMSO, and DMF with the 2-hydroxy ethylammonium lactate (HEAL) ionic liquid was investigated using a batch stirred tank with a plane of gas-liquid interface in a range of 0-2.0 kmol/m3 of HEAL and 298-318 K at 101.3 kPa. The absorption of CO2 was analyzed with the film model accompanied by the zwitterion mechanism of CO2 with HEAL. The proposed model fits the experimental data of the enhancement factor due to the ready, chemical absorption of CO2 in different solvents, temperatures, and HEAL concentrations. The reaction rate constant of CO2 with HEAL was correlated linearly with the solubility parameter of the solvent.

Keywords: 2-hydroxy ethylammonium lactate; Absorption; carbon dioxide; ionic liquid

Document Type: Research Article


Affiliations: 1: Division of Chemical Engineering, Pusan National University, Busan, Korea 2: School of Environmental Science, Catholic University of Pusan, Busan, Korea

Publication date: May 1, 2009


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