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DTSTAMP:20260921T161317
DTSTART;TZID=America/Detroit:20261029T133000
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SUMMARY:Workshop / Seminar:ChE SEMINAR: Umit Ozkan\, *Ohio State University*
DESCRIPTION:A reception with light refreshments will be held in the B10 lobby before each seminar from 1-1:30 p.m.\n\n*Abstract:*\nBridged polysilsesquioxane (BPS) is a hybrid organosilica material combining the mechanical strength of inorganic silica with the tunable chemical and structural properties of organic bridging groups. While BPS materials are widely explored as adsorbents\, their application in catalysis remains limited. Here\, we investigate BPS as a palladium (Pd) catalyst support for the aqueous-phase hydrogenation of lignocellulosic bio-oil aromatic model compounds and the hydrogenolysis of trichloroethylene (TCE)\, a toxic groundwater pollutant. Leveraging BPS tunability\, we synthesized hydrophobic Pd supports: aryl-bridged polysilsesquioxane (ABPS) and its swellable counterpart\, S-ABPS (also referred as swellable organically modified silica (SOMS)). ABPS-supported Pd catalysts exhibited remarkable activity for phenol hydrogenation and TCE hydrodechlorination\, significantly outperforming commercial Pd catalysts. Furthermore\, while state-of-the-art Pd catalysts suffer from slow kinetics at low temperatures/concentrations and poisoning by sulfur and chlorine species (SO42-\, HS-\, Cl-)\, the S-ABPS catalyst demonstrated exceptional deactivation resistance. We also investigated the effect of support’s organic content\, aromaticity\, and basicity on catalyst properties\, activity\, and selectivity. Using in situ and ex situ spectroscopy\, X-ray absorption\, and thermogravimetric analysis\, we have established structure-property-activity relationships. Ultimately\, this work demonstrates that ABPS is a highly promising support for noble metal catalysts\, offering superior metal dispersion\, poisoning resistance\, and tunable aqueous-phase activity and selectivity.\n\n*Bio:*\nUmit S. Ozkan is a Distinguished University Professor and Chair of the Chemical and Biomolecular Engineering Department at The Ohio State University\, where she has served since 1985. A renowned expert in thermal and electro-catalysis\, she has authored over 300 publications\, holds eight patents\, and has delivered hundreds of invited lectures worldwide. She is a member of the National Academy of Engineering and a fellow of AAAS\, AIChE\, and ACS. Her leadership spans numerous professional organizations including AICHE\, ACS and North American Catalysis Society.  She served or continues to serve on the Editorial Boards of Catalysis Today\, Journal of Molecular Catalysis\, Catalysis Letters\, Topics in Catalysis\, The Royal Society of Chemistry Catalysis Book Series\, Applied Catalysis B\, ACS Applied Energy Materials\, Catalysis Reviews in Science and Engineering\, ACS Catalysis\, Journal of Catalysis\, and Nature Sustainability.   \n\nProfessor Ozkan is the recipient of many honors and awards among which are North American Catalysis Society Distinguished Service in the Advancement of Catalysis Award (2027)\, the American Institute of Chemical Engineers Margaret Rousseau Pioneer Life Time Achievement Award (2024)\, American Chemical Society George Olah Award (2024)\, North American Catalysis Society Burwell Lectureship Award (2023)\, ACS Henry H. Storch Award (2017)\, ACS Energy and Fuels Distinguished Researcher Award (2012)\, John van Geuns Lectureship Award at the Van't Hoff Institute at the University of Amsterdam (2010)\, Iowa State University\, Professional Achievement Citation in Engineering (2010)\, AIChE Mentorship Excellence Award (2009)\, Fulbright Senior Scholar Award (2007)\, the Society of Women Engineers Achievement Award (2002). In 2013\, she was honored by a special volume of Topics in Catalysis. The volume included contributions from 35 different research groups from 12 different countries. In 2019\, she was again honored\, this time by a special volume of Catalysis Today.\n\nIn her research group\, Dr. Ozkan has advised and mentored over 100 graduate students\, post-doctoral researchers and honors students.
UID:152584-21913955@events.umich.edu
URL:https://events.umich.edu/event/152584
CLASS:PUBLIC
STATUS:CONFIRMED
CATEGORIES:chemical engineering,Free,graduate students,seminar
LOCATION:North Campus Research Complex Building 10 - Auditorium
CONTACT:
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