Supercritical Water Oxidation of PFAS
ECE 595 Seminar Series
September 23, 2022
11:00 AM - 12:15 PM
Supercritical Water Oxidation of PFAS
Speaker: Igor Novosselov, University of Washington
Abstract: Metal-organic frameworks (MOF) are porous materials whose large surface areas and tunable structures present opportunities for application across numerous industrial sectors. This has motivated intense research into the discovery of new MOFs and the optimization of the synthesis process. Scalable synthesis involving continuous processes is required to transition from benchtop experiments to industrial-scale applications. Due to its unique properties, supercritical carbon dioxide (scCO2) is an attractive media for the single-step synthesis of MOFs. This talk presents a novel method of continuous MOF synthesis using supercritical carbon dioxide (scCO2) as the reaction medium. The scCO2 is introduced through a custom counter-current mixer to provide enhanced heat and mass transfer to the MOF precursor materials. The method is used to synthesize the zirconium-based MOF UiO-66, and copper-based MOF HKUST-1 is also rapidly synthesized in the reactor. The HKUST -1 synthesis was examined over the course of 25 experiments as a function of pressure, scCO2 injection temperature, scCO2 mass fraction, and the reactor residence time. The morphology, crystallinity, and porosity of the MOFs were characterized by scanning electron microscopy, X-ray diffraction, and physisorption analysis. The results indicate that MOFs of comparable quality to those from the laboratory batch reactors can be obtained in short residence time (<3s) continuous flow systems. The continuous process can be readily scaled; it allows for the recovery of effluent and unreacted material, which is challenging in hydrothermal and supercritical water-based systems.
Speaker bio: Igor Novosselov is a research associate professor at the University of Washington in mechanical engineering. He received his Ph.D. from the University of Washington in 2006. After that, he worked as an R&D manager in a small company developing instrumentation for biological and chemical aerosol detection. In 2014 he joined the University of Washington mechanical engineering department; he is an adjutant faculty of the department of occupational and environmental health sciences and the core faculty at the Institute for Nano-Engineered Systems. Novosselov Research Group conducts multidisciplinary research in supercritical fluids, plasma flow interaction, and aerosol science. In his supercritical fluid particle synthesis research, his lab developed novel continuous flow synthesis methods for Metal-Organic Framework (MOF) and organic particles for drug delivery. Novosselov has 100+ peer-reviewed publications and patents. He has ten years of experience as a PI in government and industry-sponsored research, including DoD, DHS, NSF, EPA, and NIH.
Faculty host: Igor Paprotny, paprotny@uic.edu
This talk will be available via Zoom; please contact the department for login.
Date posted
Sep 22, 2022
Date updated
Sep 22, 2022