Étude expérimentale de la pyrolyse et de la combustion du polyamide-6,6 à haute température

Abstract

Lors de l'incinération de déchets plastiques azotés tels que les polyamides ou les polyuréthannes, de nombreux polluants atmosphériques azotés sont émis. Or, il n'exis te pas dans la littérature de données traitant de la for buring the incineration of nitrogen containing poly mer wastes such as polyamides and polyurethanes, many nitrogen containing atmospheric pollutants are emitted. However, there is a lack of data on ammonia and nitrogen oxide or hydrogen cyanide formation during the high temperature thermal degradation of this kind of compounds. ln order to determine the mechanisms of thermal decomposition of su ch mate rials, we studied the pyrolysis and the combustion of nylon-6,6 as a function of residence time and tempe rature. During pyrolysis, the temperature exhibits a significant influence on the hydrogen cyanide forma tion and has only little influence on the quantity of NHi emitted. With an excess of oxygen, we didn't found any more these two species. Whatever the ope rating conditions, nearly 10% of the fuel-nitrogen is converted into NO and 90% into N1.