TY - JOUR
T1 - Carbonation of basic oxygen furnace slag with metalworking wastewater in a slurry reactor
AU - Chang, E. E.
AU - Chiu, An Chia
AU - Pan, Shu Yuan
AU - Chen, Yi Hung
AU - Tan, Chung Sung
AU - Chiang, Pen Chi
N1 - Funding Information:
This study was support by National Science Council of Taiwan, R.O.C., under Grant No. NSC-101-3113-E-007-005. In addition, the China Steel Corporation (CSC) was highly appreciated for providing the steelmaking slag in this investigation.
PY - 2013/1
Y1 - 2013/1
N2 - CO2 capture 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, CO2 flow rate, and slurry volume on the CO2 fixation 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 CO2 flow rate of 1Lmin-1 at 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 CO2 capture 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.
AB - CO2 capture 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, CO2 flow rate, and slurry volume on the CO2 fixation 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 CO2 flow rate of 1Lmin-1 at 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 CO2 capture 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.
KW - Accelerated carbonation
KW - Carbon capture
KW - Carbon dioxide sequestration
KW - Cold-rolling wastewater
KW - Steelmaking slag
KW - Surface coverage model
KW - Utilization and storage
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U2 - 10.1016/j.ijggc.2012.11.026
DO - 10.1016/j.ijggc.2012.11.026
M3 - Article
AN - SCOPUS:84871733527
SN - 1750-5836
VL - 12
SP - 382
EP - 389
JO - International Journal of Greenhouse Gas Control
JF - International Journal of Greenhouse Gas Control
ER -