Ibrahim Abdul-Rauf, Vuningoma Jean Bosco, Huang Yan, Wang Hongtao, Li Jun
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.
Int J Mol Sci. 2014 Jun 25;15(7):11350-63. doi: 10.3390/ijms150711350.
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.
Ca(OH)₂的水相碳酸化是一个复杂的过程，会生成具有偏方复三方解石相的方解石，其特点是由于CO₂在水中的溶解性差，用于有效碳酸化的碳酸盐种类不足。因此，鉴于增强CO₂与Ca(OH)₂的反应，我们报道了一种使用离子液体（IL）1-丁基-3-甲基咪唑溴化物的固-液-气碳酸化体系。IL的使用提高了CO₂在水性环境中的溶解度，并增强了活性物种（Ca²⁺和CO₃²⁻）及产物的传输。IL的存在还避免了CaCO₃保护和钝化层的形成，并确保了高碳酸化产率，以及在短时间内生成化学计量的菱面体方解石相。
