Transmission of butanol isomers in pervaporation based on series resistance model

Pervaporation (PV) has shown great potential in the separation of butanol aqueous solutions due to their economic and environmental benefits. This work applies polydimethylsiloxane (PDMS) composite membrane separate four isomers (n-butanol, isobutanol, sec-butanol tert-butanol) solution. Based on physical chemical properties isomers, such as solubility, polarity interaction parameter, we systematically study transmission difference pervaporation process. The influence feed concentration, temperature permeate pressure performance PDMS are investigated. results show that contact angles layer 51°, 42.7°, 37.7°, 29.1° fluxes at 40 °C 237.6 g m-2 h-1, 245.4 224.1 169.4 h-1 for n-butanol, sec-butanol, tert-butanol, respectively. Moreover, similar compatibility principle is introduced series resistance model so process simulation matches well with antagonistic effect water molecules mass transfer isomers. permeation activation energy negative, indicating dissolution dominates diffusion In addition, low vacuum not conducive n-butanol from water. research through may pave a way other solvents properties.