PEBA and PDMS membranes were evaluated in the removal of sulfur compounds from n-octane. Tiophene and 2-methylthiophene can be successfully removed from n-octane. 2,5-Dimethyltiophene shows low separation performance in contact with PDMS membrane. Hansen’s solubility parameters are used to discuss the obtained relations. Temperature increase causes the augmentation of fluxes and decline of separation coefficient.