Background
I obtained my PhD in chemical engineering with James Dumesic and George Huber at UW-Madison, where my research elucidated the conversion mechanisms of biomass-derived intermediates to renewable chemicals over metal and acid catalysts. Prior to graduate school, I became interested in heterogeneous catalysis and sustainability as an undergraduate researcher with Alexis Bell at UC-Berkeley. In my free time, I enjoy hiking, frisbee, eating, and cheering on the Golden Bears and Badgers.
Education
- University of Wisconsin-Madison, Ph.D. Chemical Engineering, (2019)
- University of California-Berkeley, B.S. Chemical Engineering (2014)
Awards
- Henson Postdoctoral Fellow (2019)
- NSF Graduate Research Fellow (2015)
- Phi Beta Kappa Honors (2014)
Project Description
I am using a combination of kinetics and operando spectroscopy to study how the density and arrangement of Cu ion active sites in zeolites dictate their dynamic interactions during the selective catalytic reduction of nitric oxides for automotive emissions control.
Recent Publications
- S. H. Krishna, C. B. Jones, J. T. Miller, F. H. Ribeiro, R. Gounder, “Combining Kinetics and Operando Spectroscopy to Interrogate the Mechanism and Active Site Requirements of NOx Selective Catalytic Reduction with NH3 on Cu-Zeolites”, Journal of Physical Chemistry Letters, 2020, 11, 5029-5036.
- S. H. Krishna*, L. Zhang*, I. Hermans, G. W. Huber, T. F. Kuech, J. A. Dumesic, “Rates of Levoglucosanol Hydrogenolysis over Brønsted and Lewis Acid Sites on Platinum Silica-Alumina Catalysts Synthesized by Atomic Layer Deposition”, Journal of Catalysis 2020, 389, 111-120. *equal contributions.
- S. H. Krishna, J. Cao, M. Tamura, Y. Nakagawa, M. De bruyn, G. S. Jacobson, B. M. Weckhuysen, J. A. Dumesic, K. Tomishige, G. W. Huber, “Synthesis of Hexane-Tetrols and -Triols with Fixed Hydroxyl Group Positions and Stereochemistry from Methyl Glycosides over Supported Metal Catalysts”, ACS Sustainable Chemistry & Engineering, 2020, 8, 800–805.
- S. H. Krishna, M. De bruyn, Z. R. Schmidt, B. M. Weckhuysen, J. A. Dumesic, G. W. Huber, “Catalytic Production of Hexane-1,2,5,6-tetrol from Bio-renewable Levoglucosanol in Water: Effect of Metal and Acid Sites on (Stereo)-Selectivity”, Green Chemistry, 2018, 20, 4557-4565
- S. H. Krishna, K. Huang, K. J. Barnett, J. He, C. T. Maravelias, J. A. Dumesic, G. W. Huber, M. De bruyn and B. M. Weckhuysen, "Oxygenated commodity chemicals from chemo‐catalytic conversion of biomass derived heterocycles," AIChE Journal, 2018, 64, 1910-1922 (cover article).
- S. H. Krishna, R. S. Assary, Q. A. Rashke, L. A. Curtiss, J. A. Dumesic, G. W. Huber, “Mechanistic insights into the hydrogenolysis of levoglucosanol over bifunctional platinum silica-alumina catalysts”. ACS Catalysis, 2018, 3743-3753.
- S. H. Krishna, D. J. McClelland, Q. A. Rashke, J. A. Dumesic and G. W. Huber, "Hydrogenation of levoglucosenone to renewable chemicals," Green Chemistry, 2017, 19, 1278-1285. (inside front cover)
- S. H. Krishna*, T. W. Walker*, J. A. Dumesic and G. W. Huber, "Kinetics of Levoglucosenone Isomerization," ChemSusChem, 2017, 10, 129-138. *equal contributions.
- M. De bruyn, P. Cuello-Penaloza, M. Cendejas, I. Hermans, J. He, S. H. Krishna, D. M. Lynn, J. A. Dumesic, G. W. Huber and B. M. Weckhuysen, “Hexane-1,2,5,6-tetrol as a Versatile and Biobased Building Block for the Synthesis of Sustainable (Chiral) Crystalline Mesoporous Polyboronates”, ACS Sustainable Chemistry & Engineering, 2019, 7, 13430-13436.
- F. Cao, T. J. Schwartz, D. J. McClelland, S. H. Krishna, J. A. Dumesic and G. W. Huber, "Dehydration of cellulose to levoglucosenone using polar aprotic solvents," Energy & Environmental Science, 2015, 8, 1808-1815.
- J. He, K. Huang, K. J. Barnett, S. H. Krishna, D. Martin Alonso, Z. Brentzel, S. P. Burt, T. W. Walker, W. Banholzer, C. T. Maravelias, I. Hermans, J. Dumesic and G. Huber, "New catalytic strategies for alpha-omega diol production from lignocellulosic biomass," Faraday Discussions, 2017, 202, 247-267.
- S. Shylesh, D. Hanna, J. Gomes, S. H. Krishna, C. G. Canlas, M. Head-Gordon and A. T. Bell, "Tailoring the Cooperative Acid–Base Effects in Silica-Supported Amine Catalysts: Applications in the Continuous Gas-Phase Self-Condensation of n-Butanal," ChemCatChem, 2014, 6, 1283-1290.
- D. G. Hanna, S. Shylesh, Y.-P. Li, S. H. Krishna, M. Head-Gordon and A. T. Bell, "Experimental and Theoretical Study of n-Butanal Self-Condensation over Ti Species Supported on Silica," ACS Catalysis, 2014, 4, 2908-2916.