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CO2 Mineralization and Utilization Using Various Calcium-Containing Wastewater and Refining Slag via a High-Gravity Carbonation Process
Industrial & Engineering Chemistry Research ( IF 3.8 ) Pub Date : 2020-02-03 , DOI: 10.1021/acs.iecr.9b05410
Tse-Lun Chen, Wen Jiang, Ai-Lin Shen, Yi-Hung Chen, Shu-Yuan Pan, Pen-Chi Chiang

An integrated reclaimed process of refining slag with calcium-containing wastewater for CO2 mineralization and utilization by using a high-gravity carbonation process was proposed in this study. The effect of various liquid agents on calcium ion leaching behavior from the refining slag was determined and the mass-loss method was used to evaluate the leaching kinetics. The influence of different high gravity factor and liquid-to-solid ratio on carbonation conversions were investigated and the reaction kinetics were identified via surface coverage model. The efficacy of refining slag utilized as supplementary cementitious materials including workability and mechanical strength was assessed. The morphological, mineralogical, and thermal analyses were carried out and the results revealed the presence of calcite to support the carbonation theory. The results of maximal CO2 capture capacity of 0.183 g CO2 per g slag and performance of carbonated slag utilization with 5% and 10% substitution ratio confirmed the feasibility of the integrated reclaimed process.

中文翻译:

使用各种含钙废水和高炉渣碳酸化法精炼炉渣的CO 2矿化和利用

含钙废水CO 2精炼炉渣的综合回收工艺这项研究提出了利用高重力碳化过程的矿化和利用。确定了各种液体试剂对精炼炉渣中钙离子浸出行为的影响,并采用质量损失法评估了浸出动力学。研究了不同的高重力因子和液固比对碳酸化转化率的影响,并通过表面覆盖模型确定了反应动力学。评估了用作辅助水泥材料的精炼渣的功效,包括可加工性和机械强度。进行了形态学,矿物学和热学分析,结果表明存在方解石以支持碳酸化理论。最大CO 2捕集能力为0.183 g CO的结果每克炉渣2克,碳酸盐炉渣的利用率为5%和10%的替代率,证实了该综合再生工艺的可行性。
更新日期:2020-02-04
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