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SUMMARY:Separation of fluids by membrane processes
DTSTART:20160825T160000
DTSTAMP:20260408T000134Z
UID:db7cadd29a6697d995bf7aefe753a3e0e13a40ff99d278988390956e
CATEGORIES:Conferences - Seminars
DESCRIPTION:Prof. Pavel IZAK\nResearch Professor\,Head of E. Hala Laborato
 ry of Separation Processes\nInstitute of Chemical Process Fundamentals of 
 the Czech Academy of Sciences\nMembrane separation still continues to be o
 ne of the major challenges not only in chemical and biotechnological produ
 ction processes\, but also in waste water treatment. The goal of this work
  is to combine the recent developments in the field of membrane technology
 \, e.g. supported liquid membranes [1\,2]\, pervaporation [3\,4]\, and gas
  separation [5\,6\,7] with the use of ionic liquids (ILs) for providing no
 vel solutions in downstream processing or process intensification.\nILs ar
 e currently explored as new reaction media for chemical synthesis or elect
 rochemical applications\, have emerged as a new class of solvents in the l
 ast decade. ILs seem to have a large potential in downstream processing (p
 ervaporation or gas separation)\, especially when applied in a form that r
 equires only a small amount of them\, e.g. in supported liquid membranes. 
 The special property of ILs is their non-measurable vapour pressure at amb
 ient temperature that makes their application in liquid membranes attracti
 ve for pervaporation or gas separation. Pervaporation and gas separation i
 s considered as a perspective and modern membrane process for the separati
 on of various liquids or vapour mixtures.\nThe major problem associated wi
 th solute recovery by membrane processes is the restrictive compromise bet
 ween selectivity and flux: High solute selectivity involves the use of con
 ditions that lead to relatively low mass fluxes in the membrane. Supported
  ionic liquid membranes offer a range of possible advantages:\n1. Molecula
 r permeation is much higher in liquids than in polymers\, as liquids allow
  higher fluxes\;\n2. The selectivity of the separation can be influenced b
 y variation of the liquid - especially ILs offer the advantage of a wide v
 ariety of properties\;\n3. Thanks to their special mixing behavior ILs as 
 liquid membranes easily allow three-phase systems\;\n4. Contrary to the ex
 traction\, only small amount of liquid is necessary to form the liquid mem
 brane\, thus allowing also the use of more expensive materials.\nPractical
  examples of utilization of ILs in downstream processes are given.\nRefere
 nces\n1.      P. Izák\, K. Schwarz\, W. Ruth\, H. Bahl\, P. J. Dyson
 \, U. Kragl\, Applied Microbiology and Biotechnology\, 78 (2008) 597\n2. 
      M. Kohoutová\, A. Sikora\, Š. Hovorka\, A. Randová\, J. Schaue
 r\, M. Tišma\, K. Setničková\, R. Petričkovič\, N. Greenspoon\, P. Iz
 ák\, Eur. Polym. J. 45 (2009) 813\n3.      P. Izák\, N.M.M. Mateus\
 , C.A.M. Afonso\, J.G. Crespo\, Sep. Pur.\, 41 (2005) 141\n4.      P.
  Izák\, U. Kragl\, M. Köckerling\, Green Chem.\, 8 (2006) 947\n5.   
    Poloncarzová M.\, Vejražka J.\, Izák P.: Effective Purification of
  Biogas by Condensing-Liquid Membrane. Angew. Chem.-Int. Edit. 50(3)\, 669
 -671 (2011).\n6.      M. Kárászová\, J. Vejrazka\, V. Veselý\, K.
  Friess\, A. Randová\, V. Hejtmánek\, L. Brabec\, P. Izák\, Separation 
 and Purification Technology\, 89 (2012) 212\n7.      Simcik M.\, Ruzi
 cka M\, Karaszova M.\, Sedlakova Z.\, Vejrazka J.\, Friess K.\, Izak P.: P
 olyamide Thin-Film Composite Membranes for Potential Raw Biogas Purificati
 on: Experiments and Modelling. Sep. Purif. Technol. 167 (2016) 163
LOCATION:EPFL Valais Zeuzier Conference Room
STATUS:CONFIRMED
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