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Preparation of various crystal forms of calcium carbonate from industrial solidwaste by CO2 indirect mineralization

2024 No. 03
455
264
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Authors:
MEI Jieqiong
LU Shijian
REN Xuefeng
KANG Guojun
LIU Ling
Unit:
Jinagsu Key Laboratory of Coal-based Greenhouse Gas Control and Utilization,China University of Mining and Technology
Institute of Carbon Neutralization,China University of Mining and Technology
School of Chemical Engineering,China University of Mining and Technology
Abstract:

The emissions of CO2 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 CO2 mineralization processes by reacting calcium and magnesium elements with CO2 to generate stable carbonates, achieving permanent CO2 storage. Inorder to achieve large-scale CO2 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 solidwaste and CO2 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 formand 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 summarizedand discussed. The results indicate that adjusting the mineralization reaction conditions such as temperature, pH, stirring rate, and CO2 aerationrate, or adding crystal form control agents, can effectively control the crystal form, morphology, and size of calcium carbonate. The indirect mineralization of CO2 from industrial solid waste containing calcium to prepare micro nano calcium carbonate can meet the requirements of differentfields for the use of calcium carbonate, and can generate economic and environmental benefits, with broad development prospects.

Keywords:
CO2 mineralization
industrial solid waste
crystal form regulation
morphological regulation
calcium carbonate
Citation format:
梅杰琼(1996—),男,黑龙江哈尔滨人,硕士研究生。E-mail:meijieqiong2022@163.com
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Citation format:
MEI Jieqiong,LU Shijian,REN Xuefeng,et al.Preparation of various crystal forms of calcium carbonate from industrial solidwaste by CO2 indirect mineralization[J].Clean Coal Technology,2024,30(3):59-71.

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  • Executive director

    China Coal Science and Industry Group Co., Ltd

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    XIE Qiang

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    YU Chang
    SHI Yixiang
    ZHAO Yongchun
    DUAN Linbo
    CAO Jingpei
    ZENG Jie

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