CO_(2)间接矿化工业固废制备多晶型碳酸钙研究进展  

Preparation of various crystal forms of calcium carbonate from industrial solid waste by CO_(2) indirect mineralization

作　　者：梅杰琼 陆诗建 任雪峰[3] 康国俊[1,2,3] 刘玲[1,2,3] MEI Jieqiong;LU Shijian;REN Xuefeng;KANG Guojun;LIU Ling(Jinagsu Key Laboratory of Coal-based Greenhouse Gas Control and Utilization,China University of Mining and Technology,Xuzhou 221008,China;Institute of Carbon Neutralization,China University of Mining and Technology,Xuzhou 221116,China;School of Chemical Engineering,China University of Mining and Technology,Xuzhou 221116,China)

机构地区：[1]中国矿业大学江苏省煤基温室气体减排与资源化利用重点实验室,江苏徐州221008 [2]中国矿业大学碳中和研究院,江苏徐州221116 [3]中国矿业大学化工学院,江苏徐州221116

出　　处：《洁净煤技术》2024年第3期59-71,共13页Clean Coal Technology

基　　金：宁波市科技计划资助项目(2022Z163);2023年度江苏省碳达峰碳中和科技创新专项资助项目(BE2023852);高校基本科研业务费项目-科研基地建设专项资助项目(2023KYJD1004)。

摘　　要：CO_(2)和工业固体废弃物的排放量逐年上升,威胁人类的生存和发展,世界各国迫切寻求降碳减排的解决路径。研究人员基于钙、镁元素与CO_(2)反应生成稳定的碳酸盐反应,开发出一系列CO_(2)矿化工艺,实现CO_(2)的永久封存。为实现CO_(2)的大规模封存和含钙固废的高值化利用,降低矿化成本,选取廉价易得的含钙工业固体废弃物为矿化原料,从多晶型微纳米碳酸钙的制备入手,总结了含钙工业固废浸取和CO_(2)间接矿化的最新研究进展,介绍了含钙工业固废间接矿化常用的浸取剂,并着重分析了间接矿化制备微纳米碳酸钙时反应条件和晶型控制剂对碳酸钙晶型和形貌产生的影响,对其控制原理进行了解释说明,总结了CO_(2)间接矿化含钙固废当前存在的技术难点,展望了未来的研究重点。国内外结果表明,调变温度、pH、搅拌速率以及CO_(2)通气速率等矿化反应条件或添加晶型控制剂能有效控制碳酸钙的晶型、形貌和尺寸。利用含钙工业固体废弃物间接矿化CO_(2)制备微纳米碳酸钙能够满足不同领域对碳酸钙的使用要求,能带来经济效益和环境效益,具有广阔的发展前景。The emissions of CO_(2) and industrial solid waste are increasing year by year,posing a threat to human survival and development.Countries around the world are urgently seeking solutions to reduce carbon emissions.Researchers have developed a series of CO_(2) mineralization processes by reacting calcium and magnesium elements with CO_(2) to generate stable carbonates,achieving permanent CO_(2) storage.In order to achieve large-scale CO_(2) storage,high-value utilization of calcium containing solid waste,and reduce mineralization costs,inexpensive and easily available calcium containing industrial solid waste was selected as mineralization raw materials.Started from the preparation of polycrystalline micro nano calcium carbonate,the latest research progress on the leaching of calcium containing industrial solid waste and CO_(2) interstitial mineralization was summarized.The commonly used leaching agents for indirect mineralization of calcium containing industrial solid waste were introduced,and the impact of reaction conditions and crystal form control agents on the crystal form and morphology of micro nano calcium carbonate during indirect mineralization preparation was analyzed.The control principle was understood and explained.Finally,the current technical difficulties and future research focus of indirect mineralization technology were summarized and discussed.The results indicate that adjusting the mineralization reaction conditions such as temperature,pH,stirring rate,and CO_(2) aeration rate,or adding crystal form control agents,can effectively control the crystal form,morphology,and size of calcium carbonate.The indirect mineralization of CO_(2) from industrial solid waste containing calcium to prepare micro nano calcium carbonate can meet the requirements of different fields for the use of calcium carbonate,and can generate economic and environmental benefits,with broad development prospects.

关 键 词：矿化 工业固体废弃物 晶型调控 形貌调控 碳酸钙 

分 类 号：X701[环境科学与工程—环境工程]