화학공학소재연구정보센터
Journal of Chemical Technology and Biotechnology, Vol.67, No.4, 397-403, 1996
Recovery of Volatile Organic-Compounds Condensed Out of Waste Gas-Streams by Selected High-Boiling Point Extractants
Recovery of volatile organic compounds (VOCs) condensed-out of waste gas streams has been carried out using re-cyclable high boiling point extractants (HBEs). HBEs were selected using an extractant screening program (ESP) which calculated multi-component liquid-liquid equilibria and then generated a ranking of extractants in terms of either mass partition coefficient or selectivity. Investigated was recovery from condensed VOC/water mixtures of firstly 1-butanol, a solvent used in protective coatings and secondly, alcohols and esters (fusel oils) carried over in the off-gas (CO2) of alcoholic beverage fermentations. The latter are of particular interest, as they are a potential source of natural flavour and aroma compounds. With the most efficient HBE, VOC recovery in single-stage extraction was in excess of 90% for 1-butanol and 100% for the fusel oils.