Assistant Professor of Chemical Engineering
School of Chemical Engineering
Forney Hall of Chemical Engineering
480 Stadium Mall Drive
West Lafayette, IN 47907-2100
Heterogeneous catalysis is an integral component of many technologies that drive our chemical and energy industries. We are an experimental research group that studies the fundamentals and applications of heterogeneous catalysis and the targeted synthesis of inorganic solids and molecular sieves. We combine approaches in materials synthesis, characterization, and kinetic and mechanistic studies to probe the site requirements, reactive intermediates and elementary steps that constitute reaction mechanisms. We aim to develop structure-function relations that predict how reactant and catalyst structures influence reactivity and selectivity, in order to inform catalyst design and selection for new and existing catalytic processes.
Our current research interests fall within the following areas:
(i) catalytic routes and materials that enable the conversion of petroleum- and natural gas-derived hydrocarbons to transportation fuels and chemicals
(ii) catalyst design for selective reactions of multifunctional and polyfunctional molecules, such as those derived from renewable biomass, in liquid and gaseous phases
(iii) selective catalytic reduction of NOx (x = 1, 2) compounds with ammonia for pollution abatement in lean-burn engine emissions
We also focus on investigating microporous and mesoporous materials, zeolites, and molecular sieves, which are prevalent in the petrochemical refining and chemical industries. These crystalline oxides contain catalytically active sites confined within ordered void spaces (channels, cages, pockets) of molecular dimension (typically <2 nm). The properties of both the active sites and the confining environments can strongly influence catalytic rates and selectivities. In certain contexts, synthetic molecular sieves show catalytic reactivity and specificity reminiscent of that displayed by biological enzymes. One long-term goal of our research program is to understand fundamentally why and when synthetic materials exhibit such remarkable catalytic behavior.
We are a part of the Purdue Catalysis Center, which fosters interaction among faculty and students in catalysis research groups by collaborating on research projects, sharing resources and facilities, and holding weekly joint group meetings.
- Jason Bates
- Michael Cordon
- John Di Iorio
- Ravi Joshi
- James Harris (co-advised with Fabio Ribeiro and Nicholas Delgass)
- Philip Kester
- Claire Nimlos
- Juan Carlos Vega-Vila
- Jacklyn Hall
- Alyssa LaRue
Awards and Honors
"Controlling the Isolation and Pairing of Aluminum in Chabazite Zeolites Using Mixtures of Organic and Inorganic Structure-Directing Agents" J. R. Di Iorio, R. Gounder, Chemistry of Materials, 28, 2236-2247, (2016).
"Titration and Quantification of Open and Closed Lewis Acid Sites in Sn-Beta Zeolites that Catalyze Glucose Isomerization", J. W. Harris, M. J. Cordon, J. R. Di Iorio, J. C. Vega-Vila, F. H. Ribeiro, R. Gounder, Journal of Catalysis, 335, 141-154, (2016).
"The Dynamic Nature of Bronsted Acid Sites in Cu-Zeolites During NOx Selective Catalytic Reduction: Quantification by Gas-Phase Ammonia Titration", J. R. Di Iorio, S. A. Bates, A. A. Verma, W. N. Delgass, F. H. Ribeiro, J. T. Miller, R. Gounder, Topics in Catalysis, 58, 424-434, (2015).
"Isolation of the Copper Redox Steps in the Standard Selective Catalytic Reduction on Cu-SSZ-13", C. Paolucci, A. A. Verma, S. A. Bates, V. F. Kispersky, J. T. Miller, R. Gounder, W. N. Delgass, F. H. Ribeiro, W. F. Schneider, Angewandte Chemie International Edition, 53, 11828-11833, (2014).
"Hydrophobic Microporous and Mesoporous Oxides as Bronsted and Lewis Acid Catalysts for Biomass Conversion in Liquid Water", R. Gounder, Catalysis Science & Technology, 4, 2877-2886, (2014). (Invited Article).
"Methods for NH3 Titration of Bronsted Acid Sites in Cu-Zeolites that Catalyze the Selective Catalytic Reduction of NOx with NH3", S. A. Bates, W. N. Delgass, F. H. Ribeiro, J. T. Miller, R. Gounder, Journal of Catalysis, 312, 26-36 (2014).