Phase equilibrium data for carbon dioxide/methane/hydrogen + 2-methyl quinoline from T = 263–393 K and P up to 2.6 MPa

Hydrogen production via natural gas reforming with integrated carbon capture technology is a viable option as a cleaner fuel source. The solubility of carbon dioxide, methane, and hydrogen into quinaldine (a liquid organic hydrogen carrier, with a hydrogen carrying capacity of 6.6 wt%) is explored for its potential in a direct hydrogen capture application. This study investigated the phase equilibria data for carbon dioxide/methane/hydrogen + 2-methyl-quinoline (quinaldine) over a temperature range of 263–393 K and pressures up to 2.6 MPa. Experiments were conducted using a static synthetic visual apparatus. Validation of the experimental technique was performed through the measurement of vapour-liquid equilibrium data for the carbon dioxide + methanol/n-dodecane/triethylene-glycol test systems from 298 to 353 K and the hydrogen + cyclohexane test system at 303 K. Generally good comparisons were observed between the reported literature data and the data of this work. The data were regressed in Aspen Plus V14 using the Peng-Robinson equation of state. Such information aids in generating a database for phase equilibrium data related to carbon capture and energy storage materials, which forms the backbone for the design of separation and purification units. • VLE measurements were conducted using a visual synthetic high-pressure cell. • New P-T-x data for the carbon dioxide/methane/hydrogen + quinaldine systems. • Thermodynamic modelling of the data in Aspen Plus using the PR model. • 2-methyl quinoline is considered a promising liquid organic hydrogen carrier. • Phase equilibrium data related to carbon capture, energy storage materials.