The fate of nitrogen in supercritical-water oxidation

✍ Scribed by William R. Killilea; K.C. Swallow; Glenn T. Hong

• Publisher: Elsevier Science
• Year: 1992
• Tongue: English
• Weight: 994 KB
• Volume: 5
• Category: Article
• ISSN: 0896-8446
• DOI: 10.1016/0896-8446(92)90044-k

✦ Synopsis

Supercritical water oxidation is carried out at temperatures ca. 600 "C and pressures ca. 23 MPa, with a partial pressure of oxygen ca. 2 MPa. Both thermodynamic and kinetic calculations are consistent with the experimental observation that under these conditions, regardless of the oxidation state of nitrogen in the starting material, the predominant effluent species of nitrogen is N2. Fuel-bound nitrogen can result in nitrous oxide, a species which can persist in the process effluent gas due to kinetic limitations. The absence of NO, in the process effluent gas agrees with the low rates of reaction between N2 and 02 at supercritical water oxidation temperatures.