Separation of butanol from ABE mixtures by sweep gas pervaporation using a supported gelled ionic liquid membrane: Analysis of transport phenomena and selectivity

Performance of butanol separation from ABE mixtures by pervaporation using silicone-coated ionic liquid gel membranes

“…[12][13][14][15][16][17][18] In this way, supported ionic liquid membranes (SILMs) represent the rst step in the development of membrane separation processes based on the properties of ionic liquids where a macroporous membrane contains an ionic liquid into its pores. [15][16][17][18][19] However, the application of these membranes for pervaporation of butanol has been recently studied by de los Ríos and coworkers, 20 who have studied the extraction of butanol from transesterication reaction through SILMs containing tetra-uoroborate based ionic liquids, but the main problem of SILMs application was their low stability caused by carrier solvent losses during operation. Cascon and Choudhari 21 investigated the intrinsic stabilities of simple supported hydrophobic ammonium and phosphonium ionic liquid membranes and their pervaporative recoveries of 1-butanol from dilute aqueous solutions, with the same problem.…”

“…Previous tests showed that 12-hydroxystearic was an effective gelator when it is dissolved in the ILs at concentrations equal to 0.6% w/w. 15,22 The mixture containing the IL and 12-hydroxystearic acid was heated at 80 C and kept in an ultrasonic bath in order to ensure complete solubilization. The solution was spilled on the porous support placed on a PDMS lm.…”

Adsorption of butanol vapor on active carbons with nitric acid hydrothermal modification

“…Distillation (Kraemer et al, 2011) is widely used to recover volatile fermentation products, but is not practical for butanol due to high energy requirements (Oudshoorn et al, 2009b). Membrane distillation (Plaza et al, 2013) and pervaporation (Kujawski et al, 2014) (Ha et al, 2010) are often limited by the toxicity of the liquid absorbents to the microbial culture.…”

“…A more economical method of recovering butanol from dilute fermentation streams may be gas stripping (de Vrije et al, 2013;Liao et al, 2014;Plaza et al, 2013). Gas stripping is a relatively simple process in which a gas is continuously bubbled through the fermentation culture to volatilize and carry out the chemical (as well as some water vapor), which are subsequently condensed (Luo et al, 2006).…”

Synthesis of the novel symmetric buckypaper supported ionic liquid membrane for the dehydration of ethylene glycol by pervaporation

“…Compared with an organic solvent, ionic liquid has a better thermal stability and a low-to-negligible vapour pressure, which make it difficult to vaporise. Numerous studies on the applications of SILM in pervaporation http for the separation of organic compounds from dilute aqueous solutions have been reported [8][9][10][11][12][13][14]. Although the use of SILM is always associated with an instability problem caused by the leaching of the liquid membrane from the porous support, particularly under high pressure or vacuum conditions, several methods have been proposed to overcome this limitation, and these include reimmobilisation of the liquid membrane [15], surface coating [16], and mixing with a base polymer to form a thin, stable film [17].…”