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Effect of Ca/Mg molar ratio on the calcium-based sorbents
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Journal Article
Effect of Ca/Mg molar ratio on the calcium-based sorbents
2023
Overview
Steelmaking industry faces urgent demands for both steel slag utilization and CO
2
abatement. Ca and Mg of steel slag can be extracted by acid solution and used to prepare sorbents for CO
2
capture. In this work, the calcium-based sorbents were prepared from stainless steel slag leachate by co-precipitation, and the initial CO
2
chemisorption capacity of the calcium-based sorbent prepared from steel slag with the Ca and Mg molar ratio of 3.64:1 was 0.40 g/g. Moreover, the effect of Ca/Mg molar ratio on the morphology, structure, and CO
2
chemisorption capacity of the calcium-based sorbents were investigated. The results show that the optimal Ca/Mg molar ratio of sorbent for CO
2
capture was 4.2:1, and the skeleton support effect of MgO in calcium-based sorbents was determined. Meanwhile, the chemisorption kinetics of the sorbents was studied using the Avrami-Erofeev model. There were two processes of CO
2
chemisorption, and the activation energy of the first stage (reaction control) was found to be lower than that of the second stage (diffusion control).
Publisher
University of Science and Technology Beijing,Springer Nature B.V,Key Laboratory for Ecological Metallurgy of Multimetallic Mineral (Ministry of Education), Northeastern University, Shenyang 110819, China,School of Metallurgy, Northeastern University, Shenyang 110819, China,School of Metallurgy, Northeastern University, Shenyang 110819, China%Key Laboratory for Ecological Metallurgy of Multimetallic Mineral (Ministry of Education), Northeastern University, Shenyang 110819, China,Institute for Frontier Technologies of Low-Carbon Steelmaking, Northeastern University, Shenyang 110819, China%Process and Systems Engineering Laboratory, ?bo Akademi University, ?bo/Turku 20500, Finland
Subject
