Binary diffusion coefficients for infinitely diluted solutions of citral and D-limonene in supercritical CO2 were measured at 313.15, 323.15 and 333.15 K and pressures ranging from 12 to 20 MPa using the Taylor-Axis dispersion technique. The dependency on pressure, temperature and carbon dioxide density is examined, as well as the hydrodynamic behaviour. The applicability of the following models is evaluated: Dymond, Wilke-Chang, Tyn-Calus, Catchpole-King, Liu-Silva-Macedo, He-Yu-Su, Funazukuri and co-workers. The one-parameter correlation of Liu-Silva-Macedo achieves the best representation; He-Yu-Su is the best purely predictive model.