Validating carbonation parameters of alkaline solid wastes via integrated thermal analyses: Principles and applications

Journal of Hazardous Materials
Shu-Yuan PanPen-Chi Chiang

Abstract

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 tra...Continue Reading

References

Sep 6, 2005·Journal of Hazardous Materials·Eva RendekPatrick Germain
Oct 4, 2006·Waste Management·Xiaomin LiStef Simon
Jun 10, 2008·Journal of Hazardous Materials·G Montes-HernandezL Charlet
Sep 17, 2008·Journal of Environmental Management·Mai UibuRein Kuusik
Apr 17, 2009·Environmental Science & Technology·Deborah N HuntzingerLawrence L Sutter
May 29, 2012·Journal of Hazardous Materials·E-E ChangPen-Chi Chiang

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