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Int. J. Mol. Sci. 2014, 15(7), 11350-11363;

Rapid Carbonation for Calcite from a Solid-Liquid-Gas System with an Imidazolium-Based Ionic Liquid

Department of Chemical and Biochemical Engineering, College of Chemistry and Chemical Engineering, National Engineering Laboratory for Green Chemical Productions of Alcohols, Ethers and Esters, Xiamen University, Xiamen 361005, China
These authors contributed equally to this work.
Author to whom correspondence should be addressed.
Received: 8 May 2014 / Revised: 4 June 2014 / Accepted: 10 June 2014 / Published: 25 June 2014
(This article belongs to the Special Issue Ionic Liquids 2014 & Selected Papers from ILMAT 2013)
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Aqueous carbonation of Ca(OH)2 is a complex process that produces calcite with scalenohedral calcite phases and characterized by inadequate carbonate species for effective carbonation due to the poor dissolution of CO2 in water. Consequently, we report a solid-liquid-gas carbonation system with an ionic liquid (IL), 1-butyl-3-methylimidazolium bromide, in view of enhancing the reaction of CO2 with Ca(OH)2. The use of the IL increased the solubility of CO2 in the aqueous environment and enhanced the transport of the reactive species (Ca2+ and CO32−) and products. The presence of the IL also avoided the formation of the CaCO3 protective and passivation layer and ensured high carbonation yields, as well as the production of stoichiometric rhombohedral calcite phases in a short time. View Full-Text
Keywords: calcite; carbon dioxide; carbonation; solid-liquid-gas; ionic liquid calcite; carbon dioxide; carbonation; solid-liquid-gas; ionic liquid

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Ibrahim, A.-R.; Vuningoma, J.B.; Huang, Y.; Wang, H.; Li, J. Rapid Carbonation for Calcite from a Solid-Liquid-Gas System with an Imidazolium-Based Ionic Liquid. Int. J. Mol. Sci. 2014, 15, 11350-11363.

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