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| Absorption and Mineralization of CO2 with Red Mud |
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Received:November 10, 2021
Revised:November 17, 2021
Accepted:November 19, 2021
Published Online:March 15, 2022
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| DOI：doi：10.3969/j.issn.1007-7545.2022.04.008 |
| KeyWord:red mud; absorption; mineralization; CO2 capture |
| Author | Institution |
| CAO Rui-xue |
中铝郑州有色金属研究院有限公司 河南郑州 |
| KANG Ze-shuang |
中铝郑州有色金属研究院有限公司 河南郑州 |
| LIU Wan-chao |
中铝环保节能集团有限公司 |
| YAN Kun |
中铝郑州有色金属研究院有限公司 河南郑州 |
| ZHANG Teng-fei |
中铝郑州有色金属研究院有限公司 河南郑州 |
| ZHANG Yan-li |
中铝郑州有色金属研究院有限公司 河南郑州 |
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| Abstract: |
| Red mud is an alkaline industrial solid waste produced in alumina production. CO2 absorption mineralized materials was prepared from red mud. The transfer characteristics of Na+ in red mud and relationship between pH value and absorption efficiency were analyzed. The results show that there is a certain amount of cancrinite and calcite in red mud after CO2 mineralization absorbed by red mud slurry, and the specific surface area rises to 12.0 m2/g. At the same time, part of Na+ transfers from red mud into the solution, and Na+ concentration in the solution rises to 2.81 g/L. The absorption efficiency of mineralization CO2 by red mud is 27% above, and pH value of red mud generated after CO2 mineralization remains stable at about 7.5. |
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