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

Yong Sun, Gang Yang, Kevin Li, Lai Chang Zhang, Lian Zhang

    Research output: Contribution to journalArticle

    3 Citations (Scopus)

    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.

    Original languageEnglish
    Article number1335
    JournalEnvironmental Earth Sciences
    Volume75
    Issue number19
    DOIs
    Publication statusPublished - 1 Oct 2016

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