Virial equations of state for gaseous ammonia, water, carbon dioxide, and their mixtures at elevated temperatures and pressures

Abstract

The available reference and experimental data on densities of the gaseous solutions, NH3–CO2, NH3–H2O, CO2–H2O, NH3–CO2–H2O and their components, NH3, CO2, H2O have been described as accurately as possible by virial equations of state in the temperature range from ~150 to 300°C and pressure range from 1 to 280 bar. More accurate and reliable values of the gas compressibility for the ternary NH3–CO2–H2O system and new data on the virial coefficients have been obtained. It was concluded that the obtained results are of interest for physical chemical simulations of many natural and technological processes particularly in the production of carbamide and other substances on the basis of urea.