(181c) Thermodynamic Modeling of HCl-H2so4-H2o Ternary System with Electrolyte NRTL Model
AIChE Spring Meeting and Global Congress on Process Safety
Wednesday, March 29, 2017 - 2:14pm to 2:36pm
The hydrochloric acid-sulfuric acid-nitric acid system plays a critical role in stratospheric aerosol formation which leads to ozone layer deposition. Recently, this mixed acid system has gained a lot of attention in chemical nitration processes for energetic materials and in recovering noble metals from electronic waste. It is therefore important to develop for the mixed acid system a comprehensive thermodynamic model which could accurately represent various thermodynamic properties such as vapor pressure, molar enthalpy, molar heat capacity, and salt solubility. Our previous work  reported a comprehensive thermodynamic model for the HNO3-H2SO4-H2O ternary system based on the electrolyte NRTL model . In this work, we extend this work for the HCl-H2SO4-H2O ternary system with a temperature range of 273 to 373 K and H2SO4 concentration from 0 to 100 wt%. The model should be very useful in supporting heat and mass balance calculations and process simulation for processes involving HCl and H2SO4.
Hydrochloric acid, Sulfuric acid, Electrolyte NRTL model
 M. Wang, H. Kaur, C.-C. Chen, âThermodynamic Representation of Nitric Acid-Sulfuric Acid-Water Ternary System,â manuscript submitted to AIChE Journal (2016)
 Y. Song, C.-C. Chen, âSymmetric Electrolyte Nonrandom Two-Liquid Activity Coefficient Model,â Industrial & Engineering Chemistry Research, 48 (2009) 7788-7797