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Mineralization of flue gas CO2 with coproduction of valuable magnesium carbonate by means of magnesium chloride

ISSN号：0023-074X
期刊名称：《科学通报》
时间：0
分类：TQ132.2[化学工程—无机化工] X144[环境科学与工程—环境科学]
作者机构：[1]Center of CCUS and CO2 Mineralization and Utilization,Sichuan University, Chengdu 610065, China, [2]Key Laboratory of Energy Engineering Safety and Mechanics onDisasters, The Ministry of Education, Sichuan University,Chengdu 610065, China, [3]School of Chemical Engineering, Sichuan University,Chengdu 610065, China, [4]State Key Laboratory of Coal Resources and Safe Mining, ChinaUniversity of Mining Technology, Beijing 100083, China
相关基金：This work was supported by International Cooperative Research Project of the Ministry of Science and Technology （2012DFA60760）, the Natural Science Foundation of China （51120145001, 51254002）, the National Natural Science Funds for Distinguished Young Scholars （51125017）, and the Natural Basic Research Projects of China （2011CB201201, 2010CB226804）.

作者： Heping Xie[1,2], Yufei Wang[1,2], Wei Chu[1,3], Yang Ju[4]

关键词：碳矿化, CO2, 氯化镁, 碳酸镁, 二氧化碳排放, 联产, 烟气, 氢氧化镁, CO2 mineralization and utilization, CCUS, Magnesium chloride , Electrolysis, Magnesium carbonate

中文摘要：

CO2 mineralization and utilization is a new area for reducing the CO2 emissions.By reacting with natural mineral or industrial waste,CO2 can be transformed into valuable solid carbonate(such as calcium carbonate or magnesium carbonate)with recovery of some products simultaneously.In this paper,a novel method was proposed to mineralize CO2 by means of magnesium chloride with small energy consumption.In this method,magnesium chloride was firstly transformed into magnesium hydroxide by electrolysis.The formed magnesium hydroxide showed high reactivity to mineralize CO2.In our study,even at low concentration,CO2 can be effectively mineralized by this method,which makes it possible to directly mineralize flue gas CO2,avoiding the expensive process of CO2capture and purification.Moreover,valuable products such as hydromagnesite and nesquehonite can be recovered by this method.Because of the wide distribution of magnesium chloride in nature,large-scale CO2mineralization is potential by means of magnesium chloride.

英文摘要：

CO2 mineralization and utilization is a new area for reducing the CO2 emissions. By reacting with natural mineral or industrial waste, CO2 can be transformed into valuable solid carbonate （such as calcium carbonate or magnesium carbonate） with recovery of some products simultaneously. In this paper, a novel method was proposed to mineralize CO2 by means of magnesium chloride with small energy consumption. In this method, magnesium chloride was firstly transformed into magnesium hydroxide by electrolysis. The formed magnesium hydroxide showed high reactivity to mineralize CO2. In our study, even at low concentration, CO2 can be effectively mineralized by this method, which makes it possible to directly mineralize flue gas CO2, avoiding the expensive process of CO2 capture and purification. Moreover, valuable products such as hydromagnesite and nesquehonite can be recovered by this method. Because of the wide distribution of magnesium chloride in nature, largescale CO2 mineralization is potential by means of magnesium chloride.

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