Contributo da petrografia para o conhecimento da causa do aumento das emissões de NOx numa central termoeléctrica de carvão pulverizado

Abstract

NOx emissions and unburnt carbon may suddenly increase in a thermoelectric power plant, without major chemical change in the feed coal. One way of investigate these situations is the petrographic analysis of the feeds and ashes, and the information integration. Three situations are presented in this study where coal contamination, fines, and maceral composition were, or may be, the cause for increase in NOx emissions and unburnt carbon