Oxidation rates of common organic compounds in supercritical water
1998; Elsevier BV; Volume: 59; Issue: 2-3 Linguagem: Inglês
10.1016/s0304-3894(97)00152-0
ISSN1873-3336
AutoresSteven F. Rice, Richard R. Steeper,
Tópico(s)Heat transfer and supercritical fluids
ResumoSupercritical water oxidation is a rapidly emerging thermal waste-processing technology with potential as a hazardous-waste-treatment method for a variety of industrial chemicals ranging from common organic solvents to complex industrial formulations. An important design consideration in the development of supercritical water oxidation is the optimization of reactor operating temperature and feed preheat temperatures. In this paper, the temperature dependence of the oxidation in supercritical water of seven common organic compounds is examined over a temperature range of 430–585°C and reaction times ranging from 7 to 30 s at 27.6 MPa (4000 psi). The reactants are examined at approximate concentrations of 0.4 wt.% at conversion efficiencies from 50% to >99.9%. The materials examined were methanol, phenol, methyl ethyl ketone, ethylene glycol, acetic acid, methylene chloride, and 1,1,1-trichloroethane. The conversion of these compounds was monitored using total organic carbon and gas chromatography on liquid effluent samples. The results indicate that for most compounds, temperatures over 550°C and residence times near 20 s afford conversion efficiencies of greater than 99.95% based on total organic carbon.
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