Berichte der Bunsengesellschaft/Physical Chemistry Chemical Physics p. 80 - 83 (1996)
Update date:2022-08-10
Topics:
Kruse, Andrea
Ebert
Supercritical water is a powerful solvent and a favourable reaction medium for oxidation of organic material. The role of supercritical water in these processes is not fully understood. The influence of supercritical water on the pyrolysis of tert.-butylbenzene as a model compound was investigated. Experiments were carried out in a flow reactor at pressures between 5 and 25 MPa, at temperatures between 505 and 540°C and residence times between 15 and 55 s. Water, nitrogen, and water-nitrogen mixtures, respectively, were used as reaction media; no significant differences in the product formation rates and distributions were detected. In an experiment with D2O, instead of H2O, it was proved, that deuterium is incorporated in all the product substances in various amounts. Interpretating the results with a reaction model based on a radical mechanism it was made probable that H-D exchange reactions occur with radical intermediates. VCH Verlagsgesellschaft mbH, 1996.
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