https://scholars.lib.ntu.edu.tw/handle/123456789/78711
標題: | Performance evaluation for carbonation of steel-making slags in a slurry reactor | 作者: | Chang, E.-E. Chen, Chung-Hua Chen, Yi-Hung Pan, Shu-Yuan PEN-CHI CHIANG |
公開日期: | 2011 | 起(迄)頁: | 558-564 | 來源出版物: | Journal of Hazardous Materials | 摘要: | CO2 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 CO2 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 101kPa 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. © 2010 Elsevier B.V. |
URI: | https://www.scopus.com/record/display.uri?eid=2-s2.0-79551564006&origin=resultslist&sort=plf-f&src=s&sid=ade83ecf24da0123a70e17107e0c160b&sot=b&sdt=b&s=TITLE-ABS-KEY%28Performance+evaluation+for+carbonation+of+steel-making+slags+in+a+slurry+reactor%29&sl=95&sessionSearchId=ade83ecf24da0123a70e17107e0c160b&relpos=0 | DOI: | 10.1016/j.jhazmat.2010.11.038 | SDG/關鍵字: | Aqueous carbonation; Basic oxygen furnace slag; BET surface area; BOF slags; Carbonation process; Major factors; Mass transfer rate; Mineral sequestration of CO2; Operating pressure; Operational conditions; Performance evaluation; Reaction temperature; Reaction time; SEM; Shrinking-core model; Slurry reactor; Steelmaking slag; XRD; Basic oxygen converters; Calcite; Carbonate minerals; Furnaces; Metal refineries; Metallurgical furnaces; Oxygen; Reaction kinetics; Shrinkage; Silicate minerals; Slags; Steelmaking; Carbonation; carbon dioxide; carbon dioxide; carbon sequestration; measurement method; mineral; numerical model; performance assessment; pressure effect; reaction kinetics; scanning electron microscopy; slurry; steel; surface area; temperature effect; X-ray diffraction; aqueous solution; article; bioreactor; bioreactor design; carbon sequestration; carbonation; chemical reaction kinetics; controlled study; flow rate; instrumental conditioning; iron and steel industry; reaction time; scanning electron microscopy; slag; slurry reactor; solid waste management; surface property; temperature; X ray diffraction; Carbon Dioxide; Kinetics; Microscopy, Electron, Scanning; Steel; Thermogravimetry; X-Ray Diffraction |
顯示於: | 環境工程學研究所 |
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