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Gas phase reactions of radicals and molecules present many exciting and difficult challenges. These include very high rates of reaction, short lived, highly reactive species and complex, multi-channel reactions whose rates and branching fractions vary widely with temperature and pressure. Thus, as well as fascinating chemistry to uncover, gas phase chemistry presents many exciting problems for experimentalists. My main interests are in isolating elementary unimolecular and bimolecular reactions, or small groups of reactions at high temperatures and/or pressures to address problems related to fuel pyrolysis and molecular growth (PAH, soot, nanoparticle formation). The reactions I study involve simple dissociations, formally direct paths, isomerization, roaming reactions and competition between recombination, disproportionation and non-thermal dissociation. I use shock waves to create the reaction conditions. In my lab, I have a variety of novel shock tubes which nearly instantaneously generate well-defined reaction conditions from about 500K to more than 8000 K and pressures from 5 Torr to 100 bar. The shock tubes are equipped with a variety of optical and mass spectrometric diagnostics and a unique miniature shock tube can also be used at synchrotron light sources to exploit VUV and X-ray techniques. In addition, to the chemical studies I enjoy designing new experimental techniques to allow us to push the boundaries of our methods and study reactions at the most important conditions.
Gas phase reactions of radicals and molecules present many exciting and difficult challenges. These include very high rates of reaction, short lived, highly reactive species and complex, multi-channel reactions whose rates and branching fractions vary widely with temperature and pressure. Thus, as well as fascinating chemistry to uncover, gas phase chemistry presents many exciting problems for experimentalists. My main interests are in isolating elementary unimolecular and bimolecular reactions, or small groups of reactions at high temperatures and/or pressures to address problems related to fuel pyrolysis and molecular growth (PAH, soot, nanoparticle formation). The reactions I study involve simple dissociations, formally direct paths, isomerization, roaming reactions and competition between recombination, disproportionation and non-thermal dissociation. I use shock waves to create the reaction conditions. In my lab, I have a variety of novel shock tubes which nearly instantaneously generate well-defined reaction conditions from about 500K to more than 8000 K and pressures from 5 Torr to 100 bar. The shock tubes are equipped with a variety of optical and mass spectrometric diagnostics and a unique miniature shock tube can also be used at synchrotron light sources to exploit VUV and X-ray techniques. In addition, to the chemical studies I enjoy designing new experimental techniques to allow us to push the boundaries of our methods and study reactions at the most important conditions.
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ENERGIESno. 24 (2023)
COMBUSTION AND FLAME (2023): 112686
Combustion and Flame (2023): 112509-112509
Travis Sikes, Kirsten Bell Burdett, Raymond L. Speth,C. Franklin Goldsmith, Raghu Sivaramakrishnan,Robert S. Tranter
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