Study on CO<sub>2</sub> capture by steel slag in gas-liquid-solid three-phase reaction at room temperature

ZHAO Ziyu; LIU Xinyu; JIANG Yuanyuan; WU Meixuan; YANG Jie; LIU Shengyu; SUN Yuxin

doi:10.13205/j.hjgc.202505021

Volume 43 Issue 5

May 2025

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Article Navigation > ENVIRONMENTAL ENGINEERING > 2025 > 43(5): 192-198

ZHAO Ziyu, LIU Xinyu, JIANG Yuanyuan, WU Meixuan, YANG Jie, LIU Shengyu, SUN Yuxin. Study on CO2 capture by steel slag in gas-liquid-solid three-phase reaction at room temperature[J]. ENVIRONMENTAL ENGINEERING , 2025, 43(5): 192-198. doi: 10.13205/j.hjgc.202505021

Citation:

ZHAO Ziyu, LIU Xinyu, JIANG Yuanyuan, WU Meixuan, YANG Jie, LIU Shengyu, SUN Yuxin. Study on CO₂ capture by steel slag in gas-liquid-solid three-phase reaction at room temperature[J]. ENVIRONMENTAL ENGINEERING , 2025, 43(5): 192-198. doi: 10.13205/j.hjgc.202505021

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

doi: 10.13205/j.hjgc.202505021

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

Received Date: 2024-01-14
Accepted Date: 2024-04-03
Rev Recd Date: 2024-03-12

Available Online: 2025-09-11

Abstract

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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References(20)

References

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