Open AccessHIGH TEMPERATURE HIGH PRESSURE THERMODYNAMIC MEASUREMENTS FOR COAL MODEL COMPOUNDS
Author(s) -
Vinayak N Kabadi
Publication year - 1999
Language(s) - English
Resource type - Reports
DOI - 10.2172/8977
Subject(s) - uniquac , thermodynamics , gibbs free energy , enthalpy , non random two liquid model , mixing (physics) , high pressure , chemistry , physics , activity coefficient , quantum mechanics , aqueous solution
It is well known that the fluid phase equilibria can be represented by a number of {gamma}-models , but unfortunately most of them do not function well under high temperature. In this calculation, we mainly investigate the performance of UNIQUAC and NRTL models under high temperature, using temperature dependent parameters rather than using the original formulas. the other feature of this calculation is that we try to relate the excess Gibbs energy G{sup E}and enthalpy of mixing H{sup E}simultaneously. In other words, we will use the high temperature and pressure G{sup E} and H{sup E}data to regress the temperature dependant parameters to find out which model and what kind of temperature dependant parameters should be used