Invited SpeakersProfile Details

Prof. Karel Friess
Prof. Karel Friess Head of the Laboratory of Membrane Separation Processes at Department of Physical Chemistry, University of Chemistry and Technology (UCT) Prague, Czech Republic


‚ÄčAssoc. Prof. Ing. Karel Friess, Ph.D., is the head of the Laboratory of Membrane Separation Processes at Department of Physical Chemistry, University of Chemistry and Technology (UCT) Prague, Czech Republic. From March 2002 (his Ph.D. defense) he underwent two long-term Post-Doctoral research stays at the Leibnitz Institute of Polymer Research, Dresden, Germany (18 months) and at the Institute on Membrane Technology, Rende, Italy (12 months) and short stays at Ghent University, Belgium and Colorado University, Boulder, USA. In January 2014 he became an Associated Professor at UCT Prague. Prof. Friess is author or co-author of 10 book chapters and 69 peer-reviewed papers with more than 900 citations, his actual H-index (WoS, November 2016) is 18. His research activities are goal-directed on (i) development and testing of new membrane materials for targeted gas/gas and gas/vapor separations and (ii) the theoretical and experimental aspects of the mass transport in membranes. Under leadership of prof. Friess, his research group participated in solution of two Czech national grants, one European 7.FP collaborative project DoubleNanoMem and two bilateral (Czech-Italian and Czech-USA) projects. His research group is well-equipped with (i) commercial and custom-made high-tech sorption apparatuses for determination of single or mixed gas and vapors sorption and sorption kinetics, (ii) devices for sample dilation/swelling in liquid or vapor phase, (iii) device for screening of membrane surface topology and (iv) apparatuses (time-lag and with carrier gas) for determination of permeation of gases, vapors and their mixtures through polymer membranes.

All sessions by Prof. Karel Friess

  • Day 1Monday, February 20th
Session 1: Advanced Membranes/Processes I
11:30 am

New Generation of Mixed Matrix Membranes for Targeted Gas Separation

The major issue for development of new separation membranes is achieving a high selectivity towards the target gas. Polymer-based mixed matrix polymer membranes (MMMs) containing nano-scale additives are seen as a promising candidates to achieve a radical improvement in gas separation. Nevertheless, these materials very often suffer from insufficient control of the nano-level phenomena such as poor dispersion of the additives, low compatibility with the matrix, deterioration of mechanical properties that causes unwanted defects, voids, non-uniform distribution or aggregation of nano-particles in polymer matrix etc. Therefore, preparation of new sophisticated membrane materials with improved performance, i.e. enhanced permeability and/or selectivity requires new ideas and approaches. In this work, an innovative approach of the ex-situ controlled embedding of tailor-made tunable additives into highly branched polyimide-based MMMs is presented. Nano- and sub-micron additives based on zeolite-imidazole frameworks (ZIF-8), iron oxide nanoparticles and surface-modified SiO2 hollow spheres were embedded using unique custom-made device with controlled magnetic-field.
The performance of MMMs based on 4,4'-oxydiphthalic anhydride with 4,4',4''-triaminotriphenyle-methane and 4,4' (hexa-fluorisopropylidene)diphtalic-anhydride with 4,4',4''-triaminotriphenyle-methane were tested via gravimetric and time-lag fixed volume pressure increase methods. Determined results for carbon dioxide, methane and other gases show very promising properties (permeability/selectivity) in corresponding 2008 Robeson plots.

Building 19 11:30 - 12:00 Details