Experimental Study of CO2 Mineralization in Ca2+-Rich Aqueous Solutions Using Tributylamine as an Enhancing Medium
Experimental Study of CO2 Mineralization in Ca2+-Rich Aqueous Solutions Using Tributylamine as an Enhancing Medium
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三丁胺作为增强介质在富钙水溶液中CO2矿化的实验研究
DOI：
10.1021/ef402272k
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发表时间：
2014-03-01
期刊：
影响因子：
5.3
通讯作者：
Wang, Peng
中科院分区：
文献类型：
--
作者：
Liu, Xin;Wang, Wenlong;Wang, Peng
证明了使用三丁胺作为pH调节剂来增强富Ca 2+水溶液中的CO2矿化的可行性。实验研究了萃取系统组成、操作参数等因素对萃取效果的影响。以正丁醇作为三丁胺的稀释剂，当稀释比为2：1，有机水比为4：1时，初始浓度为3.4g/L时，矿化率可达93%左右。观察到500 rpm的搅拌速度足以确保有机相和水相的良好混合。反应温度的升高导致矿化率的降低。使用X-射线衍射（XRD）和扫描电子显微镜（SEM）的表征表明，沉淀产物是纯CaCO 3，其足以用于商业填充剂。Ca（OH）_2是一种优良的再生剂，可将有机相中的N（C_4H_9）_3·H ~+还原为N（C_4H_9）_3·H ~+。
The feasibility of using tributylamine as a pH regulator to enhance CO2 mineralization in Ca2+-rich aqueous solutions was demonstrated. The influencing factors, such as the makeup of the extraction system and the operating parameters, were investigated experimentally. With N-butyl alcohol as the diluent of tributylamine, the mineralization ratio could reach approximately 93% for an initial concentration of 3.4 g/L when the dilution ratio was 2:1 and the ratio of organic to water was 4:1. A stirring speed of 500 rpm was observed to be sufficient to ensure good mixing of organic and water phases. A rise in the reaction temperature results in a lowering of the mineralization ratio. Characterization using X-ray diffraction (XRD) and scanning electron microscopy (SEM) indicated that the precipitation product is pure CaCO3 that is sufficiently good for use in commercial filling agents. Moreover, it was determined that Ca(OH)2 powder acted as an excellent regenerant to turn N(C4H9)3·H+ in the organic phase back ...