CO_{class="a-plus-plus">2} mineralization using basic oxygen furnace slag: process optimization by response surface methodology

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• 作者：Yong Sun ; Gang Yang ; Kevin Li ; Lai-Chang Zhang ; Lian Zhang
• 关键词：Steelmaking slag ; CO2 mineral sequestration ; Statistical analysis ; Optimization
• 刊名：Environmental Earth Sciences
• 出版年：2016
• 出版时间：October 2016
• 年：2016
• 卷：75
• 期：19
• 全文大小：1,500 KB
• 刊物类别：Earth and Environmental Science
• 刊物主题：None Assigned
• 出版者：Springer Berlin Heidelberg
• ISSN：1866-6299
• 卷排序：75

文摘

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.