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SUMMARY:ChE Seminar: Rajamani P. Gounder\, Purdue University\,“Dynamic I
 nteractions Between Copper Active Sites in Zeolites During NOx Pollution A
 batement Catalysis” 
DTSTART;VALUE=DATE-TIME:20260217T163000Z
DTEND;VALUE=DATE-TIME:20260217T173000Z
UID:101599348526
DESCRIPTION:Sponsoredby the Department of Chemical and Biomolecular Engine
 ering  Rajamani P. Gounder Perdue University “DynamicInteractions Bet
 ween Copper Active Sites in Zeolites During NOx PollutionAbatement Catalys
 is” Tuesday\, February 17\, 2026\, 11:30 a.m.201 LGRT\, UMass Amherst(R
 efreshmentsat 11:15 a.m.) Abstract:Theselective catalytic reduction (SCR)
  of nitrogen oxides (NOx) with ammonia usingCu-exchanged zeolites is a pol
 lution abatement technology used commercially indiesel emissions control. 
 At low temperatures (&lt\;523 K)\, Cu ion active sitesbecome solvated by a
 mmonia reactants to form homogeneous-like coppercoordination complexes tha
 t are bonded ionically to anionic aluminum centers inzeolite lattices. The
  ionic tethering of metal active sites to the zeolite hostsupport confers 
 localized mobility\, providing a mechanism for the dynamic andreversible i
 nterconversion of mononuclear and binuclear sites\, mergingattractive feat
 ures of both heterogeneous and homogeneous catalysts. We combineexperiment
 al and computational approaches to interrogate catalysts in operando under
  widely varyingoperating conditions\, including beyond those typical of co
 mmercial operation.We show that the effects of Cu ion mobility are preemin
 ent for low-temperatureNOx SCR reactivity and selectivity\, leading to dra
 matic differences inperformance among Cu-zeolites of different bulk and at
 omic structure. Bio:RajGounder is the R. Norris and Eleanor Shreve Profes
 sor of Chemical Engineeringat Purdue University. He received his BS in Che
 mical Engineering with a doublemajor in Chemistry from Wisconsin in 2006\,
  his PhD in Chemical Engineering fromUC-Berkeley in 2011\, and a postdocto
 ral appointment at Caltech in 2013. Hisresearch group studies catalysis f
 or applications in energy production andenvironmental protection\, includi
 ng automotive pollution abatement andconverting carbon feedstocks such as 
 shale gas to fuels and chemicals. Hisresearch focuses on elucidating the k
 inetic and mechanistic details ofcatalytic reactions\, synthesizing zeolit
 es with tailored site and surfaceproperties\, and developing methods to ch
 aracterize and titrate active sites incatalytic materials.  Hisresearch h
 as been recognized by the PECASE award\, the NSF and DOE Early CareerAward
 s\, the ACS Early Career in Catalysis Award\, and the Sloan ResearchFellow
 ship in Chemistry. His teaching has been recognized by the Shreve(undergra
 duate) and Wankat (graduate) Awards for Outstanding Teaching inChemical En
 gineering at Purdue\, and his mentoring by the Outstanding MentoringAward 
 of Engineering Graduate Students at Purdue. He is an Associate Editor of S
 cience Advances and Reaction Chemistry &amp\; Engineering.
LOCATION:LGRT 201
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