Kinetics of wet air oxidation of diethanolamine and morpholine

Abstract

The kinetics of Wet Air Oxidation of morpholine and diethanolamine (DEA) in aqueous solutions, were studied. The rates of destruction were measured with respect to reduction in substrate concentration and with respect to reduction in Chemical Oxygen Demand (COD). The studies were performed in the temperature range of 160-240°C and oxygen partial pressure was in the range of 0.34-1.36 MPa. The order with respect to COD and substrate concentration (morpholine and diethanolamine) was found to be one. Order with respect to oxygen concentration ranged from 0.3 to 0.9. The energy of activation was found to be in the range of 18.5-27.24 kcal/gmol. Monoethanolamine was found to be one of the intermediates formed during oxidation of morpholine and DEA. The mixtures of diethanolamine and morpholine were found to oxidize faster than that expected from the individual rate of oxidation.