High-pressure multiphase behavior of the ternary systems (ethene + water 4- 1-propanol)and (ethene + water + 2-propanol)Part I:Experimental investigation

摘要

New experimental results for the high-pressure liquid-liquid-vapor equilibrium and critical endpoints lines of the ternary systems (ethene + water +1 -propanol) and (ethene + water + 2-propanol) at 293,313,and 333 K are reported.The entire pressure range was investigated where an aqueous solution of 1 -propanol (or 2-propanol) reveals a liquid-liquid phase split when it is pressurized with ethene:that pressure range extends from about 4.5 to about 20.1 MPa (for ethene + water + 1-propanol) and from about 7.5 to about 16.6 MPa (for ethene + water + 2-propanol),respectively.Furthermore,the temperature-pressure coordinates of both critical endpoint lines ((L_1 = L_2)VandLi(L_2 = V)) were determined and the coordinates of the tricritical point (L_1 = L_2 = V) were estimated for both ternary systems.Additionally,the formation of hydrates was observed during experiments at lower temperatures (288 and 283 K).