Synthesis of vaterite CaCO3 micro-spheres by carbide slag and a novel CO2-storage material
Synthesis of vaterite CaCO3 micro-spheres by carbide slag and a novel CO2-storage material
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电石渣合成球霰石CaCO3微球及新型CO2储存材料
DOI：
10.1016/j.jcou.2017.01.004
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发表时间：
2017-03-01
影响因子：
7.7
通讯作者：
Zhang, Jianbin
中科院分区：
文献类型：
--
作者：
Guo, Bo;Zhao, Tianxiang;Zhang, Jianbin
采用电石渣饱和溶液直接水热法合成了球文石型碳酸钙微球，并以1，2-乙二胺（EDA）+1，2-乙二醇（EG）等摩尔体系吸收CO2（ChemPhysChem.，16（2015）2106），不含任何外部添加剂。值得注意的是，在100（圈）C下，在100 g L（1）CO2 SM浓度下持续90 min，CaCO 3沉淀物的形态可以被控制为均匀的球形（纯球霰石），其中从CO2 SM释放的EDA和/或EG用作表面活性剂。在100 g L（1）CO2 SM溶液中沉淀出CaCO 3晶体后，过滤后的溶液不仅可以重复用于吸收CO2，而且可以加入电石渣反复制备相同晶相的CaCO 3微粒。该工艺为电石渣与CO2的综合利用提供了一条新的途径。(C)2017爱思唯尔有限公司版权所有
A facile and direct hydrothermal method for the crystallization of vaterite CaCO3 micro-spheres in the presence of carbide slag saturated limpid solution and a new CO2-storage material (CO2SM), which was obtained from an equimolar system of 1,2-ethylenediamine (EDA) + 1,2-ethylene glycol (EG) uptaking CO2 (ChemPhysChem., 16 (2015) 2106), was presented without any outside additives. It's worth noting that the morphologies of CaCO3 precipitates could be controlled as homogeneous spherical-like (pure vaterite) at the 100 g L (1) CO2SM concentration for 90 min at 100(circle)C, in which released EDA and/or EG from the CO2SM was used as surfactants. After the precipitation of CaCO3 crystals in 100 g L (1) CO2SM solution, the filtered solution could not only be reused to absorb CO2, but also to prepare the same crystal phase CaCO3 micro-particles repeatedly with the addition of carbide slag. Thus, this novel synthesis process of CaCO3 micro-particles with carbide slag and the CO2SM offers an alternative way for the comprehensive utilization of CO2 and the solid waste carbide slag. (C) 2017 Elsevier Ltd. All rights reserved.