Concentration by pervaporation of representative brown crab volatile compounds from dilute model solutions

Concentration by pervaporation of brown crab volatile compounds from dilute model solutions: Evaluation of PDMS membrane

“…Further, these results are compared with a previous work [4], where pervaporation was carried out with a POMS/PEI membrane.…”

“…A multicomponent dilute aqueous solution was prepared with seven selected volatile compounds [4] belonging to different chemical classes: 1-octen-3-ol (Sigma Aldrich, 98 %), 1-penten-3-ol (Sigma Aldrich, 99 %), 3-methylbutanal (Sigma Aldrich, 97 %), hexanal (Sigma Aldrich, 98 %), benzaldehyde (Sigma Aldrich, >=99 %), 2,3-pentadione (Sigma Aldrich, 98 %) and ethyl acetate (Sigma Aldrich, HPLC grade). Some thermodynamic properties of the selected compounds are listed in Table 1.…”

“…In this study, pervaporation has been performed through a PDMS membrane, while in a previous work, results were obtained by using a POMS membrane [4]. Table 2 compares the performance of PERVAP TM 4060 and POMS/PEI membranes at a pervaporation temperature of 26ºC and a permeate pressure of 300 Pa.…”

“…In a previous study [4], organophilic pervaporation through a polyoctylmethylsiloxane membrane was shown to be able to concentrate some compounds of the brown crab boiling juice from a model dilute aqueous solution. In this work, pervaporation through a polydimethylsiloxane membrane has been performed to compare the ability of the two polymers, POMS and PDMS, to recover some aroma compounds found in the brown crab boiling juice from model dilute aqueous solutions.…”

Activity Coefficients at Infinite Dilution of Volatile Compounds in Water: Effect of Temperature and Salt Concentration

“…In previous work (1), it has been reported that the pervaporation technique is a promising alternative to recover the volatile fraction from brown crab processing effluent.…”