Accession Number : ADA325537

Title :   Supercritical Water Oxidation Studies: Understanding the Chemistry and Electrochemistry of SCWO Systems.

Descriptive Note : Final progress rept.,

Corporate Author : PENNSYLVANIA STATE UNIV UNIVERSITY PARK CENTER FOR ADVANCED MATERIALS

Personal Author(s) : MacDonald, Digby D. ; Arthur, Heidi ; Biswas, Ritwik ; Eklund, Keith ; Hara, Nobuyoshi

PDF Url : ADA325537

Report Date : FEB 1997

Pagination or Media Count : 328

Abstract : SuperCritical Water Oxidation (SCWO) is being actively developed as a means of destroying highly toxic organic waste and as a way of reducing the volume of low-level nuclear waste. The technology employs water at temperatures above the critical temperature (374.15K) as the reaction medium as well as high partial pressures of oxygen or high concentrations of hydrogen peroxide. These conditions lead to extraordinarily high corrosion rates within + or -50 deg C of Tc, which can be characterized in terms of the pM and redox potential of the medium. In this report, techniques that have been developed under ARO sponsorship for measuring pM, redox potential, O2, H2, and corrosion activity at high subcritical and at supercritical temperatures are described. We show that measurement of many important chemistry and corrosion parameters is technically developed in this study will allow for in close control of the reaction medium.

Descriptors :   *WATER, *ELECTROCHEMISTRY, *OXIDATION, *SUPERCRITICAL FLOW, TEMPERATURE, CORROSION, PARAMETERS, TOXICITY, HIGH PRESSURE, CRITICAL TEMPERATURE, OXYGEN, CONCENTRATION(COMPOSITION), RADIOACTIVE WASTES, OXIDATION REDUCTION REACTIONS, PARTIAL PRESSURE, HYDROGEN PEROXIDE.

Subject Categories : Inorganic Chemistry
      Physical Chemistry
      Fluid Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE