CO2 mineralization using basic oxygen furnace slag: process optimization by response surface methodology

Authors

Yong Sun, CSIRO
Gang Yang, Institute of Process Engineering Chinese Academy of Sciences, Beijing, China
Kevin Li, University of Western Australia
Laichang Zhang, School of EngineeringFollow
Lian Zhang, Monash University

Document Type

Journal Article

Publication Title

Environmental Earth Sciences

Publisher

Springer

Place of Publication

Germany

School

School of Engineering

RAS ID

22324

Comments

Sun, Y., Yang, G., Li, K., Zhang, L. C., & Zhang, L. (2016). CO2 mineralization using basic oxygen furnace slag: Process optimization by response surface methodology. Environmental Earth Sciences, 75(19), article 1335. Available here.

Abstract

The basic oxygen furnace steelmaking slag (SL) is employed for CO₂ mineralization. Response surface methodology and the central composite design were employed in determining the optimal condition. The optimization goal in this paper has been set for maximum CO₂ capturing. It was found that the reaction temperature and CO₂ pressure and their combination were significant. A quadratic model was developed for process optimization and statistical experimental designs. The CO₂ capture capacity could reach 126 g CO₂/kg SL at optimal condition. The increased reaction temperature will lead to an obvious decrease of CaCO₃ and increase of MgCO₃. If deployed, this optimized indirect CO₂ mineral sequestration process could permanently capture 252,000 tons of CO₂ per annum based upon current 2 million tons of SL productivity per annum. © 2016, Springer-Verlag Berlin Heidelberg.

DOI

10.1007/s12665-016-6147-7

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