Department of Biochemistry, Taipei Medical University, Taipei, Taiwan.
J Hazard Mater. 2011 Feb 15;186(1):558-64. doi: 10.1016/j.jhazmat.2010.11.038. Epub 2010 Nov 18.
CO(2) sequestration by the aqueous carbonation of steel-making slag under various operational conditions was investigated in this study. The effects of the operational conditions, including type of steel-making slag, reaction time, reaction temperature, and CO(2) flow rate, on the performance of the carbonation process were evaluated. The results indicated that the BOF slag had the highest carbonation conversion, approximately 72%, at a reaction time of 1h, an operating pressure of 101 kPa and a temperature of 60°C due to its higher BET surface area of BOF slag compared to UF, FA, and BHC slags. The major factors affecting the carbonation conversion are reaction time and temperature. The reaction kinetics of the carbonation conversion can be expressed by the shrinking-core model. The measurements of the carbonated material by the SEM and XRD instruments provide evidence indicating the suitability of using the shrinking-core model in this investigation. Comparison of the results with other studies suggests that aqueous carbonation by slurry reactor is viable due to its higher mass transfer rate.
本研究考察了在不同操作条件下，通过炼钢渣的水合碳酸化作用来捕获 CO2。评估了操作条件，包括炼钢渣的类型、反应时间、反应温度和 CO2 流速对碳酸化过程性能的影响。结果表明，由于 BOF 渣的 BET 表面积高于 UF、FA 和 BHC 渣，因此在反应时间为 1h、操作压力为 101kPa 和温度为 60°C 的条件下，BOF 渣的碳酸化转化率最高，约为 72%。影响碳酸化转化率的主要因素是反应时间和温度。碳酸化转化率的反应动力学可以用收缩核模型来表示。SEM 和 XRD 仪器对碳酸化材料的测量提供了证据，表明在本研究中使用收缩核模型是合适的。与其他研究的结果进行比较表明，由于具有较高的传质速率，浆态反应器中的水合碳酸化是可行的。
