Conferencia: «Identifying active sites responsible for selective upgrading of renewable biomass and waste plastics with reducible oxide supported catalysts», por Prof. Steven Crossley

El próximo miércoles 12 de julio a las 12:30 h, en el Salón de Actos del ITQ, el Prof. Steven Crossley de la Universidad de Oklahoma, impartirá la charla titulada «Identifying active sites responsible for selective upgrading of renewable biomass and waste plastics with reducible oxide supported catalysts»

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Steven Crossley
Teigen Presidential Professor and Sam A. Wilson Professor
School of Sustainable Chemical, Biological, and Materials Engineering
University of Oklahoma, Norman, OK

 

ABSTRACT

The conversion of renewable biomass, waste plastic, natural gas, carbon dioxide, and many other important emerging streams to high value fuels and other products relies on highly active and stable catalysts capable of targeting specific bonds in a complex reaction environment. This presents a formidable challenge. Among the most promising families of catalysts to carry out this task, particularly for C-O bond activation, are metals supported on active reducible supports such as TiO2 or MoO3. These catalysts are also incredibly complex themselves. Because so many different surface features exist under reaction conditions, the underlying reason behind their promising behavior often remains elusive. In this presentation we discuss the various prospective active sites and introduce a unique approach to differentiate active sites by spatially separating them on conductive hydrogen highways. This allows us to differentiate active sites that are created on reducible oxide supports promoted by the metal via hydrogen spillover from unique active sites that are created around the perimeter of metal nanoparticles. We show several examples relevant to the production of high value products from biomass and waste plastics to illustrate how decoupling of active sites can help us to better understand and design improved catalysts in emerging areas.

 

BIOGRAPHY

Steven Crossley received his Ph.D. in chemical engineering with Daniel Resasco from the University of Oklahoma in 2009. From 2009-2011, he conducted research at ConocoPhillips, now Phillips 66, in the areas of fluid catalytic cracking and hydrocracking. In August 2011, Dr. Crossley joined the University of Oklahoma. His research involves evaluation of reaction mechanisms over zeolites and reducible oxides for biomass conversion, polymer upcycling, and CO2-free hydrogen generation. He is currently leading several large grants in the areas of waste polymer conversion and CO2-free hydrogen production. Dr. Crossley is the recipient the NSF CAREER award (2017) the inaugural Jischke prize (2023) and the OU VPRP award for Excellence in Research in Engineering and Applied Science (2023).  Dr. Crossley holds the Teigen Presidential Professorship and Sam A. Wilson professorship. He served as the CATL division Programming Chair for the 2019 and 2020 American Chemical Society fall national meetings and has served in multiple elected roles in the division since. He also served as president for the Great Plains Catalysis Society in 2022. He currently serves as associate director of the Institute for Resilient Environmental and Energy systems at OU.Dr. Crossley works to facilitate the success of Native American students in STEM fields and serves as faculty advisor for the University of Oklahoma’s award-winning American Indian Science and Engineering (AISES) chapter.

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