MODEL OF VAPOR-LIQUID PHASE-EQUILIBRIUM I N H-2, N-2, AR, CH4, NH3 - SYSTEM USED FOR COMPUTER-SIMULATION OF AMMONIA PRODUCTION LINE

Using the method of equation of state (phi-phi) the model of vapour-li quid phase equilibrium for the industrial conditions (T, p, x, y) of a mmonia outdropping from the post-reactor gases was developed. Satisfac tory results were obtained for Redlich-Kwong-Soave-Stryjek-Vera and Pe ng-Robinson equation of state. Algorithm of the VLE determination (fla sh type), according to the above models, used as an element of the own simulation software for ammonia line ''TAWAS'' has been supplemented with a new semi-empirical procedure for the reduction of computational erros of ammonia concentration in gaseous phase because of it's techn ological importance.