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    High-Flux Thin Film Composite PIM-1 Membranes for Butanol Recovery: Experimental Study and Process Simulations

    Year: 2021

    Journal: ACS Appl. Mater. Interfaces, Volume 13, 42248, page 42635–42649

    Authors: Contreras-Martinez, Jorge; Mohsenpour, Sajjad; Ameen, Ahmed W.; Budd, Peter M.; Garcia-Payo, Carmen; Khayet, Mohamed; Gorgojo, Patricia

    Organizations: Spanish Ministry of Economy and Competitiveness; European Social Fund; Spanish Ministry of Science, Innovation, and Universities [RTI2018-096042-B-C22, CTM2015-65348-C2-2-R]; University of Manchester; European Social Fund through the Ramon y Cajal program [RYC2019-027060-I/AEI/10.13039/501100011033]

    Keywords: pervaporation; electrospinning; polymer of intrinsic microporosity PIM-1; n-butanol recovery; hybrid PV-distillation systems

    Thin film composite (TFC) membranes of the prototypical polymer of intrinsic microporosity (PIM-1) have been prepared by dip-coating on a highly porous electrospun polyvinylidene fluoride (PVDF) nanofibrous support. Prior to coating, the support was impregnated in a non-solvent to avoid the penetration of PIM-1 inside the PVDF network. Different nonsolvents were considered and the results were compared with those of the dry support. When applied for the separation of n-butanol/water mixtures by pervaporation (PV), the developed membranes exhibited very high permeate fluxes, in the range of 16.1-35.4 kg m(-2) h(-1), with an acceptable n-butanol/water separation factor of about 8. The PV separation index (PSI) of the prepared membranes is around 115, which is among the highest PSI values that have been reported so far. Hybrid PV-distillation systems have been designed and modeled in Aspen HYSYS using Aspen Custom Modeler for setting up the PIM-1 TFC and commercial PDMS membranes as a benchmark. The butanol recovery cost for the hybrid systems is compared with a conventional stand-alone distillation process used for n-butanol/water separation, and a 10% reduction in recovery cost was obtained.
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