首页|工业固废CO2矿化协同减污降碳关键技术进展

工业固废CO2矿化协同减污降碳关键技术进展

Advances in key technologies of synergistic pollution and carbon reduction by industrial solid waste CO2 mineralization

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针对工业过程CO2和固废排放的问题,减污降碳刻不容缓.CO2矿化技术在封存CO2的同时固废得到资源化利用,受到广泛关注.论述了不同工业固废作为CO2矿化原料的利用情况,对比分析了不同矿化工艺优缺点及CO2矿化机理,总结了不同CO2矿化工艺研究现状和工业化应用情况.研究发现,目前针对固废CO2矿化缺乏机制性解释,无法有效控制金属离子的浸取过程和矿化过程中气液固传质的效率,同时矿化形成的碳酸盐产品存在粒径大、易团聚、功能单一等问题.未来需进一步研究浸渍过程中表面溶剂扩散等控制浸取速率和程度的机制;深入研究碳酸盐成核结晶动力学机制及碳酸盐晶体形貌、粒度调控方法;构建煤基固废浸取、矿化溶质气-液-固传输模型,进行工艺参数优化和过程强化并确定放大规律;进一步加强CO2矿化利用技术全生命周期和经济评价;最后,需加大CO2矿化利用技术的中试、示范技术集成和成套工艺建设,为规模化减污降碳技术的工业化发展奠定技术支撑.
In view of the problem of CO2 and solid waste emissions in industrial processes,it is urgent to reduce pollution and carbon.CO2 mineralization technology has attracted more and more attention because it can be used as resources while storing CO2.The utilization of different industrial solid waste as raw materials for CO2 mineralization was discussed,the advantages and disadvantages of different miner-alization processes and the mechanism of CO2 mineralization were compared and analyzed,and research status and industrial application of different CO2 mineralization processes were summarized.It is found that at present,there is no mechanical explanation for solid waste CO2 mineralization,and it is impossible to effectively control the leaching process of metal ions and the efficiency of gas-liquid-solid mass transfer in the mineralization process.At the same time,carbonate products formed by mineralization have some problems,such as large particle size,easy agglomeration and single function.The mechanism of controlling leaching rate and degree,such as surface solvent diffu-sion,should be further investigated in future research.The dynamic mechanism of nucleation and crystallization of carbonate and the con-trol methods of morphology and particle size of carbonate crystals should be studied.It is important to establish the gas-liquid-solid trans-port model of coal-based solid waste leaching and mineralized solute,optimize the process parameters,carry out process strengthening,and determine the scale-up law.The whole life cycle and economic evaluation of CO2 mineralization utilization technology should be fur-ther strengthened to make it more energy saving and cost saving.Finally,it is necessary to increase the integration of pilot and demonstra-tion technologies and complete process construction of CO2 mineralization utilization technology to lay technical support for the industrial development of large-scale pollution reduction and carbon reduction technologies.

CO2 captureindustrial solid wasteCO2 mineralizationabsorption and mineralization integrationreduce pollution and carbon

李磊、潘鑫、刘鲁豫

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中国科学院山西煤炭化学研究所 煤炭高效低碳利用全国重点实验室,山西 太原 030001

中国科学院大学,北京 101408

CO2捕集 工业固废 CO2矿化 吸收-矿化一体化 减污降碳

中国科学院战略性先导科技专项课题资助项目(A类)山西省科技创新人才团队专项资助项目山西煤化所自主创新项目-基础研究资助项目山西省重点研发计划资助项目山西省重点研发计划资助项目天津市科技计划资助项目中国工程院院地合作资助项目

XDA0390404202204051001012SCJC-DT-2023-0320220209030101320210209030100822YFYSHZ002902022NXZX2

2024

10.13226/j.issn.1006-6772.CN23090801

洁净煤技术
煤炭科学研究总院 煤炭工业洁净煤工程技术研究中心

洁净煤技术

CSTPCD北大核心
影响因子：0.893
ISSN：1006-6772
年,卷(期)：2024.30(7)
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