|About this Abstract
||2016 TMS Annual Meeting & Exhibition
||Energy Technologies and Carbon Dioxide Management
||K-5: Thermodynamic Analysis in the System of Ca(II)-NH3-NH4Cl-H2O
||ZhiBo Tong, Guojun Ma, Xiang Zhang, Baoping Zhang
|On-Site Speaker (Planned)
In order to study the process of wastes slag leached with ammonia chloride, the thermodynamics equilibrium in the system of Ca(II)-NH3-NH4Cl-H2O was theoretically calculated based on the principles of ionic balance, electro-neutrality and the existing thermodynamic data. The results show that increasing of concentrations of NH4Cl and ammonia improves the concentration of free ammonia in the system. When the ammonia concentration keeps constant, total calcium concentration increase linearly. At current concentrations of ammonia and NH4Cl in the system, calcium mainly presents in the form of calcium bearing complexes instead of calcium ion. The absolute average error between the experimental values and the theoretical calculated values of calcium equilibrium concentration is 7.68%. The results are helpful to clarify the leaching behavior of Ca ions in the system of Ca(II)-NH3-NH4Cl-H2O and provide the theoretical foundation for improving the Ca yield in the indirect aqueous mineral carbonation process.
||Planned: A print-only volume