Thermodynamics Research Center / ThermoML | Journal of Chemical and Engineering Data

ABSTRACT

A high-pressure view-cell technique based on the synthetic method was used to determine the solubility of ammonia in liquid methanol (total pressure at a preset temperature and liquid-phase composition). The solubility pressure ranges up to about 4.2 MPa. The temperature amounts to (313.75, 354.35, and 395.0) K. The molality of ammonia in methanol (the mole fraction of ammonia in the liquid) ranges up to about 66.4 molakg-1 (about 0.68). Furthermore, a high-pressure cell technique based on the analytical method was used to investigate the vaporliquid equilibrium of that same system (equilibrium pressure as well as liquid- and gas-phase compositions at a preset temperature). The solubility pressure ranges up to about 1.6 MPa. The temperature amounts to (353.1 and 393.1) K. The molality of ammonia in methanol (the mole fraction of ammonia in the liquid) ranges up to 13 molakg-1 (about 0.3). The experimental results are used to determine Henry s constant of ammonia in methanol. Furthermore, the experimental data are correlated by applying Pitzer s molality scale based equation for the Gibbs excess energy.