Utilization of steelmaking slag for carbon capture and storage with flue gas.

Autor: RushendraRevathy TD; Centre for Climate Change and Disaster Management, Anna University, Chennai, 600 025, India. rushendrarevathytd.cc@gmail.com., Ramachandran A; Centre for Climate Change and Disaster Management, Anna University, Chennai, 600 025, India., Palanivelu K; Centre for Climate Change and Disaster Management, Anna University, Chennai, 600 025, India.; Centre for Environmental Studies, Anna University, Chennai, 600 025, India.
Jazyk: angličtina
Zdroj: Environmental science and pollution research international [Environ Sci Pollut Res Int] 2022 Jul; Vol. 29 (34), pp. 51065-51082. Date of Electronic Publication: 2021 Nov 16.
DOI: 10.1007/s11356-021-17493-4
Abstrakt: Carbon capture and storage is a necessary action for the reduction of CO 2 emissions, and thereby mitigation of climate change and its impacts. Especially, in India, with its growing fuel needs and very little attention paid towards carbon capture and storage, mineral carbonation technology is a suitable option as it is cost-effective and could be retrofitted to existing plants that emit CO 2 . Given the development of carbon capture and storage technology, this study attempts direct mineral carbonation of steelmaking slag with flue gas. Response surface methodology was employed to design gas-solid and slurry phase aqueous carbonation experiments. A maximum reduction of about 36.1% was achieved through aqueous carbonation at 61.1 °C, 46.24 bar, and a liquid-to-solid ratio of 14.5, corresponding to a sequestration capacity of 127.4 g of CO 2 /kg of slag. The temperature was found to be the most vital parameter in both the aqueous and gas-solid carbonation processes. Regression models used to study the carbonation process were found to be statistically significant. The carbonated slag consisted of mineral phases, namely, calcite and dolomite. The results demonstrated the sequestration potential of Indian steelmaking slag with flue gas. Carbonation of steelmaking slag with flue gas poses to be a promising option for the development of carbon capture and storage technology in the country.
(© 2021. The Author(s), under exclusive licence to Springer-Verlag GmbH Germany, part of Springer Nature.)
Databáze: MEDLINE
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