title: Grafting of cellulose acetate with ionic liquids for biofuel purification by a membrane process: Influence of the cation.
abstract: A new strategy was developed for grafting ionic liquids (ILs) onto cellulose acetate in order to avoid IL extraction and improve its performance for ethyl tert-butyl ether (ETBE) biofuel purification by the pervaporation membrane process. This work extended the scope of IL-containing membranes to the challenging separation of organic liquid mixtures, in which these ILs were soluble. The ILs contained the same bromide anion and different cations with increasing polar feature. The membrane properties were strongly improved by IL grafting. Their analysis in terms of structure-property relationships revealed the influence of the IL content, chemical structure and chemical physical parameters α, β, π* in the Kamlet-Taft polarity scale. The ammonium IL led to the best normalized flux of 0.182kg/m(2)h for a reference thickness of 5μm, a permeate ethanol content of 100% and an outstanding infinite separation factor for the azeotropic mixture EtOH/ETBE at 50°C.
authors.affiliation: Laboratoire de Chimie Physique Macromoléculaire, Université de Lorraine, ENSIC, LCPM UMR CNRS 7375, 1 rue Grandville, BP 20451, 54 001 Nancy Cedex, France.
authors.forename: Faten
authors.initials: F
authors.lastname: Hassan Hassan Abdellatif
authors.affiliation: Laboratoire de Chimie Physique Macromoléculaire, Université de Lorraine, ENSIC, LCPM UMR CNRS 7375, 1 rue Grandville, BP 20451, 54 001 Nancy Cedex, France.
authors.forename: Jérôme
authors.initials: J
authors.lastname: Babin
authors.affiliation: Laboratoire de Chimie Physique Macromoléculaire, Université de Lorraine, ENSIC, LCPM UMR CNRS 7375, 1 rue Grandville, BP 20451, 54 001 Nancy Cedex, France.
authors.forename: Carole
authors.initials: C
authors.lastname: Arnal-Herault
authors.affiliation: Laboratoire IMP@Lyon1, Université Claude Bernard Lyon 1, Univ. Lyon, CNRS UMR 5223, 15 Bd. André Latarjet, 69622 Villeurbanne Cedex, France.
authors.forename: Laurent
authors.initials: L
authors.lastname: David
authors.affiliation: Laboratoire de Chimie Physique Macromoléculaire, Université de Lorraine, ENSIC, LCPM UMR CNRS 7375, 1 rue Grandville, BP 20451, 54 001 Nancy Cedex, France. Electronic address: anne.jonquieres@univ-lorraine.fr.
authors.forename: Anne
authors.initials: A
authors.lastname: Jonquieres
mesh_terms: D056804:Biofuels; D002412:Cations / Q000737:chemistry; D002482:Cellulose / Q000031:analogs & derivatives* / Q000737:chemistry; D002623:Chemistry Techniques, Analytical / Q000379:methods*; D052578:Ionic Liquids / Q000737:chemistry*
chemical_list: D056804:Biofuels; D002412:Cations; D052578:Ionic Liquids; C005062:acetylcellulose; D002482:Cellulose
keywords: Biofuel; Ethyl tert-butyl ether; Ionic liquids; Membranes; Polysaccharide modification; Structure-property relationships