Kinetics of Supercritical Water Oxidation
Quarterly rept. 1 Oct-31 Dec 95
SANDIA NATIONAL LABS LIVERMORE CA COMBUSTION RESEARCH FACILITY
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This project consists of experiments and theoretical modeling designed to improve our understanding of the detailed chemical kinetics of supercritical water oxidation SCWO processes. The objective of the three year project is to develop working models that accurately predict the oxidation rates and mechanisms for a variety of key organic species over the range of temperatures and pressures important for industrial applications. Our examination of reaction kinetics in supercritical water undertakes in situ measurements of reactants, intermediates, and products using optical spectroscopic techniques, primarily Raman spectroscopy. Our focus is to measure the primary oxidation steps that occur in the oxidation of methanol, higher alcohols, methylene chloride, and some simple organic compounds containing nitro groups. We are placing special emphasis on identifying reaction steps that involve hydroxyl radical, hydroperoxyl radical, and hydrogen peroxide. The measurements are conducted in two optically accessible reactors, the supercritical flow reactor SFR and the supercritical cell reactor SCR, designed to operate at temperatures and pressures up to 600 deg C and 500 MPa. The combination of these two reactors permit reaction rate measurements raging from 0.1 s to many hours.
- Industrial Chemistry and Chemical Processing
- Physical Chemistry