TY - JOUR
T1 - Validating carbonation parameters of alkaline solid wastes via integrated thermal analyses
T2 - Principles and applications
AU - Pan, Shu Yuan
AU - Chang, E. E.
AU - Kim, Hyunook
AU - Chen, Yi Hung
AU - Chiang, Pen Chi
N1 - Funding Information:
The authors wish to thank the Ministry of Science and Technology (MOST) of Taiwan (R.O.C.) for the financial support under grant number MOST 105-3113-E-007-001 . In addition, Prof. H. Kim was supported by the R&D Program of MKE/KEIT (10037331, Development of Core Water Treatment Technologies based on Intelligent BT-NT-IT Fusion Platform).
Publisher Copyright:
© 2015 Elsevier B.V.
PY - 2016/4/15
Y1 - 2016/4/15
N2 - Accelerated carbonation of alkaline solid wastes is an attractive method for CO2 capture and utilization. However, the evaluation criteria of CaCO3 content in solid wastes and the way to interpret thermal analysis profiles were found to be quite different among the literature. In this investigation, an integrated thermal analyses for determining carbonation parameters in basic oxygen furnace slag (BOFS) were proposed based on thermogravimetric (TG), derivative thermogravimetric (DTG), and differential scanning calorimetry (DSC) analyses. A modified method of TG-DTG interpretation was proposed by considering the consecutive weight loss of sample with 200-900 °C because the decomposition of various hydrated compounds caused variances in estimates by using conventional methods of TG interpretation. Different quantities of reference CaCO3 standards, carbonated BOFS samples and synthetic CaCO3/BOFS mixtures were prepared for evaluating the data quality of the modified TG-DTG interpretation, in terms of precision and accuracy. The quantitative results of the modified TG-DTG method were also validated by DSC analysis. In addition, to confirm the TG-DTG results, the evolved gas analysis was performed by mass spectrometer and Fourier transform infrared spectroscopy for detection of the gaseous compounds released during heating. Furthermore, the decomposition kinetics and thermodynamics of CaCO3 in BOFS was evaluated using Arrhenius equation and Kissinger equation. The proposed integrated thermal analyses for determining CaCO3 content in alkaline wastes was precise and accurate, thereby enabling to effectively assess the CO2 capture capacity of alkaline wastes for mineral carbonation.
AB - Accelerated carbonation of alkaline solid wastes is an attractive method for CO2 capture and utilization. However, the evaluation criteria of CaCO3 content in solid wastes and the way to interpret thermal analysis profiles were found to be quite different among the literature. In this investigation, an integrated thermal analyses for determining carbonation parameters in basic oxygen furnace slag (BOFS) were proposed based on thermogravimetric (TG), derivative thermogravimetric (DTG), and differential scanning calorimetry (DSC) analyses. A modified method of TG-DTG interpretation was proposed by considering the consecutive weight loss of sample with 200-900 °C because the decomposition of various hydrated compounds caused variances in estimates by using conventional methods of TG interpretation. Different quantities of reference CaCO3 standards, carbonated BOFS samples and synthetic CaCO3/BOFS mixtures were prepared for evaluating the data quality of the modified TG-DTG interpretation, in terms of precision and accuracy. The quantitative results of the modified TG-DTG method were also validated by DSC analysis. In addition, to confirm the TG-DTG results, the evolved gas analysis was performed by mass spectrometer and Fourier transform infrared spectroscopy for detection of the gaseous compounds released during heating. Furthermore, the decomposition kinetics and thermodynamics of CaCO3 in BOFS was evaluated using Arrhenius equation and Kissinger equation. The proposed integrated thermal analyses for determining CaCO3 content in alkaline wastes was precise and accurate, thereby enabling to effectively assess the CO2 capture capacity of alkaline wastes for mineral carbonation.
KW - Analytical
KW - CO fixation
KW - Kissinger equation
KW - Mineralization
KW - Stabilization
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U2 - 10.1016/j.jhazmat.2015.12.065
DO - 10.1016/j.jhazmat.2015.12.065
M3 - Article
AN - SCOPUS:84960332842
SN - 0304-3894
VL - 307
SP - 253
EP - 262
JO - Journal of Hazardous Materials
JF - Journal of Hazardous Materials
ER -