Carbonation of basic oxygen furnace slag with metalworking wastewater in a slurry reactor
Carbonation of basic oxygen furnace slag with metalworking wastewater in a slurry reactor
复制标题
DOI：
10.1016/j.ijggc.2012.11.026
复制
发表时间：
2013
影响因子：
3.9
通讯作者：
E. Chang;An-Chia Chiu;S. Pan;Yi-Hung Chen;Chung-Sung Tan;P. Chiang
中科院分区：
文献类型：
--
作者：
E. Chang;An-Chia Chiu;S. Pan;Yi-Hung Chen;Chung-Sung Tan;P. Chiang
在含金属加工废水的浆态反应器中，研究了碱性氧炉炉渣加速碳化捕集二氧化碳的效果。使用中国钢铁公司(台湾高雄)提供的两种金属加工废水：冷轧废水(CRW)和金属加工废水处理厂(EW)。考察了金属加工废水的种类、反应时间、液固比(L/S)、CO2流量、料浆体积等操作条件对CO2固定过程的影响。结果表明，在常温常压下，转炉渣的碳化程度最高，为89.4%，反应时间为120min，L与S的摩尔比为20：1，CO2流量为1Lmin−1。此外，还利用表面覆盖模型对水相碳化反应动力学进行了评价。本研究为以冶金废水和炼钢废渣为原料回收利用炼钢烟气中的二氧化碳提供了一种可行的途径，可减少水资源的使用，降低总成本。与文献中的其他研究相比，本研究表明碳化转化率较高，消耗的能源和资源较少。
CO2capture by accelerated carbonation of basic oxygen furnace (BOF) slag in a slurry reactor containing metalworking wastewater was investigated in this study. Two types of metalworking wastewater provided by China Steel Corp. (Kaohsiung, Taiwan) were used: cold-rolling wastewater (CRW) and effluent from a metalworking wastewater treatment plant (EW). The effect of operational conditions including the type of metalworking wastewater, reaction time, liquid-to-solid (L/S) ratio, CO2flow rate, and slurry volume on the CO2fixation process was evaluated. The results indicated that BOF slag in CRW provided the highest degree of carbonation, 89.4%, with a reaction time of 120min, an L/S ratio of 20:1, and a CO2flow rate of 1Lmin−1at ambient temperature and pressure. In addition, the kinetics of the aqueous carbonation was evaluated using the surface coverage model. This study provided a promising alternative for CO2capture from the flue gas in steelmaking process by reusing the metalworking wastewater and steelmaking slag as feedstock, which could reduce the use of water resources as well as the total cost. Compared with other studies in the literature, this study showed a higher carbonation conversion with less consumption of energy and resources.