title: Desolventizing of Jatropha curcas oil from azeotropes of solvents using ceramic membranes.
abstract: The separation of Jatropha curcas oil from azeotropes of ethyl alcohol-n-hexane and isopropyl alcohol-n-hexane using ceramic membranes with different cutoffs (5, 10 and 20 kDa) is presented. The mass ratios of oil:azeotropes (O:S) studied were 1:3 for feeding pressures of 0.1, 0.2 and 0.3 MPa, and 1:1 for the feeding pressure of 0.1 MPa. Isopropyl alcohol was the best solvent for the membranes conditioning to permeate n-hexane (240 kg/m2h). In the separation of J. curcas oil and azeotropes of solvents, both membranes showed oil retention and total flux decreases with time. Overall, the lowest decrease in the retentions was reached in the 5 kDa membrane, while the lowest decrease in the total flux was reached in the 20 kDa. In the separation of oil and ethyl alcohol-n-hexane azeotrope, the best retention at 60 min of the process was equal to 17.3 wt% in the 20 kDa membrane at 0.3 MPa and O:S ratio equalled to 1:3. In this condition, the total permeate flux was 17.5 kg/m2h. Different retentions and permeabilities are provided when changing the O:S ratio, the feeding pressure and the molecular weight cutoff of membranes.
authors.affiliation: a Department of Food Engineering , URI Erechim , Erechim , Brazil.
authors.forename: Naira
authors.initials: N
authors.lastname: Carniel
authors.affiliation: b Laboratory of Bioresources Engineering , Federal University of Santa Maria, UFSM , Cachoeira do Sul , Brazil.
authors.forename: Giovani L
authors.initials: GL
authors.lastname: Zabot
authors.affiliation: a Department of Food Engineering , URI Erechim , Erechim , Brazil.
authors.forename: Marshall
authors.initials: M
authors.lastname: Paliga
authors.affiliation: a Department of Food Engineering , URI Erechim , Erechim , Brazil.
authors.forename: Marcelo L
authors.initials: ML
authors.lastname: Mignoni
authors.affiliation: c Department of Chemical Engineering , UFSM , Santa Maria , Brazil.
authors.forename: Marcio A
authors.initials: MA
authors.lastname: Mazutti
authors.affiliation: d Department of Food Technology , IFRS , Sertão , Brazil.
authors.forename: Wagner L
authors.initials: WL
authors.lastname: Priamo
authors.affiliation: e Department of Chemical and Food Engineering , UFSC , Florianópolis , Brazil.
authors.forename: J V
authors.initials: JV
authors.lastname: Oliveira
authors.affiliation: e Department of Chemical and Food Engineering , UFSC , Florianópolis , Brazil.
authors.forename: Marco
authors.initials: M
authors.lastname: Di Luccio
authors.affiliation: b Laboratory of Bioresources Engineering , Federal University of Santa Maria, UFSM , Cachoeira do Sul , Brazil.
authors.forename: Marcus V
authors.identifier: http://orcid.org/0000-0001-5252-0735
authors.initials: MV
authors.lastname: Tres
mesh_terms: D019840:2-Propanol / Q000737:chemistry; D002516:Ceramics / Q000737:chemistry*; D005591:Chemical Fractionation / Q000379:methods*; D006586:Hexanes / Q000737:chemistry; D031286:Jatropha / Q000737:chemistry*; D008567:Membranes, Artificial; D010938:Plant Oils / Q000737:chemistry / Q000302:isolation & purification*; D012997:Solvents / Q000737:chemistry*
chemical_list: D006586:Hexanes; D008567:Membranes, Artificial; D010938:Plant Oils; D012997:Solvents; C026385:n-hexane; D019840:2-Propanol
keywords: Jatropha curcas; Ultrafiltration; azeotropic mixture; desolventizing; permeability