Raghu Sivaramakrishnan

Biography

Raghu Sivaramakrishnan is a Chemist in the Gas Phase Chemical Dynamics group at Argonne National Laboratory. He received a B. Tech. in Chemical Engineering (1999) from the University of Madras, and an MS (2002) and PhD (2005) in Chemical Engineering from the University of Illinois at Chicago (Advisor - Kenneth Brezinsky), working on high pressure shock tube studies and chemical kinetics modeling on the combustion of hydrocarbon fuel components. He continued as a post-doc and research staff member (2005-2007) in Ken Brezinsky’s group before moving to Argonne as a post-doc (2007) to work with Joe V. Michael to characterize the kinetics of elementary reactions. In 2010, he was hired as a research staff at Argonne where his research interests involve applications of theoretical and experimental chemical kinetics to model reactions of gas-phase molecules relevant to combustion and propulsion, atmospheric chemistry, and practical chemical conversions. He is a past awardee (2006) of the Bernard Lewis Fellowship from the Combustion Institute. He has been a chemical kinetics colloquium co-chair for the 37^th (2018) and 38^th (2020) International Combustion Symposia and is an Associate Editor (2020 onwards) for the Proceedings of the Combustion Institute.

Recent Publications

S. J. Klippenstein, R. Sivaramakrishnan, N. J. Labbe, Y. Tao, M. P. Burke, S. N. Elliott, C. F. Goldsmith, C. R. Mulvihill, A. W. Jasper, B. Ruscic, D. H. Bross, P. Glarborg, N. Hansen, J. Zador, J. A. Miller, Theoretically Informed Kinetics (ThInK): Establishing a modern C₀-C₃ mechanism for combustion modeling, Comb. and Flame, 282, 114501 (2025). https://authors.elsevier.com/a/1luU92KiHm357

J. H. Kim, K. Kim, S. L. Peukert, J. V. Michael, R. Sivaramakrishnan, M. S. Wooldridge, R. S. Tranter, Direct measurements for the kinetics of C-C bond fission in the high temperature decomposition of isopropanol, Phys. Chem. Chem. Phys., In Press (2025). https://doi.org/10.1039/D5CP02482J

A. Kokernak, J. Mathew, R. Sivaramakrishnan, S. J. Klippenstein, J. Jayachandran, Flame kinetics at scramjet-engine-relevant conditions: Role of prompt dissociation of weakly-bound radicals, Comb. and Flame, 272, 113834 (2025). https://doi.org/10.1016/j.combustflame.2024.113834

R. T. Saragi, N. A. Seifert, R. Sivaramakrishnan, K. Prozument, Thermally Initiated Formation of Criegee Intermediate CH₂OO in the Oxidation of Ethane, J. Phys. Chem. Lett., 15, 12441-12448 (2024). https://doi.org/10.1021/acs.jpclett.4c02445

R. Sivaramakrishnan, S. J. Klippenstein, Resolving discrepancies between theory and experiment for the NCN + H reaction, Proc. Combust. Inst., 40, 105403 (2024).https://doi.org/10.1016/j.proci.2024.105403

R. A. Shaik, A. W. Jasper, P. T. Lynch, R. Sivaramakrishnan, R. S. Tranter, Initiation and Carbene Induced Radical Chain Reactions in CH₂F₂ Pyrolysis, Chem. Phys. Chem., 25, e202400362, (2024). https://doi.org/10.1002/cphc.202400362

J. Cho, N. J. Labbe, L. B. Harding, S. J. Klippenstein, R. Sivaramakrishnan, Competing Radical and Molecular Channels in the Unimolecular Dissociation of Methylformate, Proc. Combust. Inst., 40, 105684 (2024). https://doi.org/10.1016/j.proci.2024.105684

J. Cho, D. Rosch, Y. Tao, D. L. Osborn, S. J. Klippenstein, L. Sheps, R. Sivaramakrishnan, Modeling–Experiment–Theory Analysis of Reactions Initiated from Cl + Methyl Formate, J. Phys. Chem. A, 127, 9804-9819 (2023). https://doi.org/10.1021/acs.jpca.3c05085

J. Cho, C. R. Mulvihill, S. J. Klippenstein, R. Sivaramakrishnan, Bimolecular peroxy radical (RO₂) reactions and their relevance in radical initiated oxidation of hydrocarbons, J. Phys. Chem. A, 127, 300-315 (2023). https://pubs.acs.org/doi/full/10.1021/acs.jpca.2c06960

J. Cho, Y. Tao, Y. Georgievskii, S. J. Klippenstein, A. W. Jasper, R. Sivaramakrishnan, The role of collisional energy transfer on the thermal and prompt dissociation of 1-methyl allyl. Proceedings of the Combustion Institute, 39, 601-609 (2023). https://dx.doi.org/10.1016/j.proci.2022.07.155

A. W. Jasper, D. R. Moberg, Y. Tao, S. J. Klippenstein, R. Sivaramakrishnan, Inefficient intramolecular vibrational energy redistribution for the H + HO₂ reaction and negative internal energy dependence for its rate constant. Frontiers in Physics, 10, 1003010 (2022). https://dx.doi.org/10.3389/fphy.2022.1003010

S. Desai, Y. Tao, R. Sivaramakrishnan, Y. Wu, T. Lu, J. H. Chen, Effects of non-thermal termolecular reactions on detonation development in hydrogen (H₂)/methane (CH₄) - air mixtures. Combustion and Flame, 244,112277 (2022). https://dx.doi.org/10.1016/j.combustflame.2022.112277

D.P. Zaleski, R. Sivaramakrishnan, H.R. Weller, N.A. Seifert, D.H. Bross, B. Ruscic, K.B. Moore, S.N. Elliot, A.V. Copan, L.B. Harding, S.J. Klippenstein, R.W. Field, K. Prozument, Substitution reactions in the pyrolysis of acetone revealed through a modeling, experiment, theory paradigm. Journal of the American Chemical Society, 143, 3124-3142 (2021). https://pubs.acs.org/doi/full/10.1021/jacs.0c11677

Y. Tao, A.W. Jasper, Y. Georgievskii, S.J. Klippenstein, R. Sivaramakrishnan, Termolecular chemistry facilitated by radical-radical recombinations and its impact on flame speed predictions. Proceedings of the Combustion Institute 38, 515-522 (2021). https://dx.doi.org/10.1016/j.proci.2020.06.342

J.A. Miller, R. Sivaramakrishnan, Y. Tao, C.F. Goldsmith, M.P. Burke, A.W. Jasper, N. Hansen, N.J. Labbe, P. Glarborg, J. Zador, Combustion chemistry in the twenty-first century: Developing theory-informed chemical kinetics models. Progress in Energy and Combustion Science, 83, 100886 (2021). https://dx.doi.org/10.1016/j.pecs.2020.100886

J.R. Barker, R. Sivaramakrishnan, A pioneer of direct measurements to advance modern gas-phase chemical kinetics. International Journal of Chemical Kinetics, 53, 3-6, (2021). Editorial for J.V. Michael Memorial Issue. https://dx.doi.org/10.1002/kin.21424