Measurement of activity coefficient at infinite dilution for some bio-oil components in water and mass transfer study of bubbles in the dilutor

Activity coefficients at infinite dilution (γ∞) values are of great importance when designing separation processes like distillation, liquid–liquid extraction and gas stripping. In this study the γ∞ values were determined for four compounds in water that are present in bio-oil. Henry’s law constants (H12), Partial molar excess enthalpies at infinite dilution (H¯iE,∞) and air–water partition coefficients (Kaw) are also reported. The measurements were performed using inert gas stripping equipment (dilutor) in the 298–340 K temperature range. Mass transfer study was also performed to investigate the equilibrium between the solution and the gas leaving the cell.