Conference Proceedings

Oxidation kinetics of model compounds of metabolic waste in supercritical water

PA Webley, HR Holgate, DM Stevenson, JW Tester

SAE Technical Papers | Published : 1990

Abstract

Oxidation of human metabolic waste in a supercritical water environment is an effective method for the recycling of aqueous wastes in a closed or partially enclosed environmental life support system. Partial oxidation of human wastes leads to formation of smaller compounds such as low molecular weight carbohydrates and urea which in turn oxidize to alcohols and ammonia. The complete oxidation of alcohols and ammonia to carbon dioxide and nitrogen is frequently the rate limiting step in the overall oxidation mechanism. In this NASA-funded study (grant no. NAG9-252), the oxidation kinetics of methanol and ammonia in supercritical water have been experimentally determined in an isothermal plug ..

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