Deodorization of model biogas by meansof novel non-ionic deep eutectic solvent

The paper presents new non-ionic deep eutectic solvent (DES) composed of natural and non-toxic components i.e. guaiacol, camphor and levulinic acid in 1:1:3 molar ratio as a promising absorbent for removal of selected volatile organic compounds (VOCs) including dichloromethane, toluene, hexamethyldisiloxane and propionaldehyde from model biogas.The affi nity of DES for VOCs was determined as vapour-liquid coeffi cients and the results were compared with several well-known DESs based on quaternary ammonium salt as well as n-hexadecane and water.For new DES, the absorption process was carried out under dynamic conditions.The results indicate that non-ionic DES has high affi nity and capacity for VOCs being comparable to n-hexadecane.In addition, absorbed VOCs could be easily desorbed from DES using activated carbon and absorbent could be re-use minimum fi ve times without signifi cant loss of absorption capacity.