Heterogeneous oxidative desulfurization for model fuels using novel PW-coupled polyionic liquids with carbon chains of different lengths

摘要

Novel PW-coupled polyionic liquids with different alkyl chain lengths, poly(1-n-ethyl-3-vinylimidazolium bromide) (PEVImPW), poly(1-n-butyl-3-vinylimidazolium phosphotungstate) (PBVImPW), poly (1-n-octyl-3-vinylimidazolium phosphotungstate) (POVImPW), and poly(1-n-dodecyl-3-vinylimidazolium phosphotungstate) (PDVImPW), have been successfully synthesized and characterized by FTIR, XRD, TG, C-13 NMR, P-31 NMR, ICP and CHN elemental analysis. The obtained catalysts have been applied in heterogeneous oxidative desulfurization (ODS) processes. Their ODS performances have been studied. The results indicated PBVImPW was revealed to be a highly efficient catalyst and the benzothiophene removal of 99% was achieved in 2.5 h, 50 degrees C. The catalyst could be recycled four times. (C) 2017 Published by Elsevier B.V. on behalf of Taiwan Institute of Chemical Engineers.