High-Pressure CO2 Hydrogenation into Methanol: Measurement and Modeling of pvT Data

In this work, we report new experimental pvT data of nonreactive mixtures of H₂ + carbon dioxide (CO₂) + CH₃OH + H₂O at high temperature/high pressure, in the range of industrial interest. Mixtures have been prepared considering an initial mole ratio of 1:2.9 CO₂/H₂, and different hypothetical stoichiometric conversions of CO₂ (60% to 94%) to CH₃OH/H₂O (1:1 mol ratio) are considered in the experiments. Isochoric studies of the multicomponent system between 0.08 g·cm^–3 and 0.5 g·cm^–3 show evidence of the phase transition from heterogeneous to homogeneous phase conditions at temperatures and pressures higher than 530 K and 24 MPa, respectively.