The pervaporation separation of four important aroma compounds of tomato juice (1-hexanol, hexanal, 2-heptenal, and 6-methyl-5-hepten-2-one) was investigated. Ethyl- ene propylene diene monomer (EPDM) and polyether block amide (PEBA) membranes were fabricated and applied to treat binary model solutions containing one of the aroma compounds in water. Results showed that at 25C, PEBA membrane had higher total flux, organic flux, and pervaporation separation index (PSI) than EPDM membrane, while EPDM performed better in terms of separation factor. For PEBA, the highest total flux (395.93 g/m2hr) was observed in separating 1-hexanol, and for EPDM, the highest total flux (116.82 g/m2hr) was seen in treating 6-methyl-5-hepten-2-one/water at 25C. Fur- thermore, the impact of feed temperature on pervaporation performance was investi- gated. A rise from 25 to 45C increased the total and organic fluxes for both of the membranes. The separation factors of PEBA and EPDM changed differently with tem- perature; higher temperatures led to improved separation factor for PEBA and reduced separation factor for EPDM. Moreover, increased feed temperature improved PSI for both membranes, while the change was more significant for PEBA

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