Affiliation:
1. Shenyang University of Technology
2. Dalian University of Technology
Abstract
The purpose of this paper is to investigate the effects of ionic liquids (ILs) oil-in-water emulsion on CO2 absorption. 1-octyl-3-methylimidazolium hexafluorophosphate as ILs was dispersed into water forming oil-in-water emulsion to absorb carbon dioxide. Effects of dispersed phase volume fraction, droplet size, and the regeneration of dispersion were studied. Experimental results indicate that ILs oil-in-water emulsion can enhance the CO2 absorption rate under lower dispersion phase volume fraction, and the CO2 mass transfer rate increases with dispersion phase volume fraction. The smaller droplet size can help droplet go into the boundary layer to load CO2 so as to increase the CO2 mass transfer rate. ILs emulsion can be regenerated, but their enhancement effect becomes weaken with the increase of regeneration times.
Publisher
Trans Tech Publications, Ltd.
Reference10 articles.
1. G. Vazquez, G. Antorrena, J. M. Navaza, V. Santos. Absorption of CO2 by water and surfactant solutions in the presence of induced marangoni effect, Chemical Engineering Science, vol. 51, pp.3317-3324, December, (1996).
2. Zhang Feng, Fang Cheng-Gang, Wu You-Ting, Wang Yuan-Tao, Li Ai-Min, Zhang Zhi-Bing, Absorption of CO2 in the aqueous solutions of functionalized ionic liquids and MDEA, Chemical Engineering Journal, vol. 160, p.691–697, (2010).
3. Sina Rezvani, YeHuang, DavidMcIlveen-Wright, NeilHewitt, JayantaDebMondol, Comparative assessment of coal fired IGCC systems with CO2 capture using physical absorption, membrane reactors and chemical looping, Fuel, vol. 88, p.2463–2472, (2009).
4. D. Wappel, G. Gronald, R. Kalb, J. Draxler, Ionic liquids for post-combustion CO2 absorption, International Journal of Greenhouse Gas Control, vol. 4, p.486–494, (2010).
5. L.M.G. S´anchez, G.W. Meindersma, Kinetics of absorptionof CO2 in amino-functionalized ionic liquids, Chemical Engineering Journal (2010) , doi: 10. 1016/j. cej. 2010. 12. 016, In press.