常温下气-液-固三相反应中钢渣对CO<sub>2</sub>的捕集研究

赵子宇; 刘鑫宇; 姜媛媛; 吴美璇; 杨杰; 刘盛余; 孙玉馨

doi:10.13205/j.hjgc.202505021

常温下气-液-固三相反应中钢渣对CO₂的捕集研究

doi: 10.13205/j.hjgc.202505021

1. 成都信息工程大学资源环境学院, 成都 610225;
2. 华测认证有限公司, 北京 100020;
3. 成都信息工程大学大气科学学院, 成都 610225;
4. 昆明理工大学环境科学与工程学院, 昆明 650500;
5. 重庆大学环境与生态学院, 重庆 400044

基金项目:

国家自然科学基金青年项目（42307525）；成都信息工程大学引进人才项目（KYTZ202137）；大气环境模拟与污染控制四川省高校重点实验室开放课题（KFKT-YB-202203）

详细信息

作者简介:
赵子宇（1992-），男，讲师，主要研究方向为新污染物防控、减污降碳技术开发。zhaozy@cuit.edu.cn

通讯作者:
赵子宇（1992-），男，讲师，主要研究方向为新污染物防控、减污降碳技术开发。zhaozy@cuit.edu.cn

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出版历程
- 收稿日期: 2024-01-14
- 录用日期: 2024-04-03
- 修回日期: 2024-03-12
- 网络出版日期: 2025-09-11

Study on CO₂ capture by steel slag in gas-liquid-solid three-phase reaction at room temperature

1. College of Resources and Environment, Chengdu University of Information Technology, Chengdu 610225, China;
2. CTI Certification Co., Ltd., Beijing 100020, China;
3. School of Atmospheric Science, Chengdu University of Information Technology, Chengdu 610225, China;
4. Faculty of Environmental Science and Engineering, Kunming University of Science and Technology, Kunming 650500, China;
5. College of Environment and Ecology, Chongqing University, Chongqing 400044, China

摘要

摘要: 为了改善钢渣吸附CO₂工艺高温高耗能的缺点，在钢渣中加入H₂O于常温下进行三相反应，探究三相体系中气体流速、钢渣粒径、固液比对CO₂吸附效率的影响。然后利用XRD、热力学、动力学分析及SEM进行分析，探究其吸附产物生产量。结果表明：液相的加入显著影响了CO₂在常温下的吸附效率，CaCO₃的衍射峰相比两相反应体系明显增强，生成的CaCO₃晶体含量更多，晶型相对较好，碳化度更高。当反应固液比为25 g/L时，随着钢渣比表面积与气体流速的增大，CO₂的吸附效率明显增大。在常温下，当气体流速为250 mL/min、钢渣粒径为200目时，测得其吸附效率达到0.97%，而传统二相反应钢渣捕集CO₂，其温度需达到400~500℃才可达到相同效率。该研究可为钢渣的资源化利用及低能耗捕集CO₂提供新的思路。
- 三相反应 /
- 钢渣 /
- 碳捕集 /
- 常温 /
- 资源化利用
Abstract: In the context of carbon peaking and carbon neutrality， the development of economical and efficient carbon capture materials has become a critical research field. Steel slag， as a solid waste， has presented considerable potential for carbon capture； however， its application is limited by relatively high external energy consumption. In order to address the shortcomings of high-temperature and high-energy-consumption of CO₂ adsorption by steel slag， water was added into steel slag for a three-phase reaction at room temperature. The effects of gas flow rate， steel slag particle size， and solid-liquid ratio on CO₂ adsorption efficiency in three-phase systems were studied. Then， XRD， thermodynamic， kinetic analysis， and SEM were used to analyze the adsorption product production. The results showed that the addition of a liquid phase significantly affected the adsorption efficiency of CO₂ at room temperature. The diffraction peak of CaCO₃ was significantly enhanced compared to that in the two-phase reaction system， indicating a higher content of generated CaCO₃ crystals， better crystal form， and a higher carbonation degree. When the solid-liquid ratio was 25 g/L， the adsorption efficiency of CO₂ increased obviously with the increase of the specific surface area of steel slag and the gas flow rate. At room temperature， when the gas flow rate was 250 mL/min and the steel slag particle size was 200 mesh， the adsorption efficiency was measured to be 0.97%. However， in the traditional two-phase reaction， to achieve the same efficiency，the temperature needed to be as high as 400 to 500 ℃. This study provides new ideas for the resource utilization of steel slag and low-energy-consumption CO₂ capture.
- three-phase reaction /
- steel slag /
- carbon capture /
- room temperature /
- resource utilization

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参考文献(20)

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