Dimensionless Henry's constant and liquid-vapour equilibrium of rosemary aroma compounds

摘要

In order to estimate the mass transfer characteristics of absorption into alcohol solution of aroma compounds such as cineol, myrecene and pinene which are major aroma compounds of rosemary, dimensionless Henry's constant in 70 percent ethyl alcoholconcentration and aroma concentration with different ethyl alcohol concentration were analyzed. From the results of measurement of vapor phase concentration of aroma compounds with different ethyl alcohol concentration, headspace concentrations of all ofthree aroma compounds were decreased as ethyl alcohol concentration increased. But those patterns were slightly different. Dimensionless Henry's constant equation (Hi) of cineol compound with ethyl alcohol concentration (x) was as follows: Hi = (-5.75 +x)/(-7017.6 + 257.3 X x). Dimensionless Henry's constants of cineol, myrecene and pinene in 1 atm, 25 deg C and 70 percent ethyl alcohol concentration were 0.0058, 0.0182 and 0.0365, respectively.