Some Aspects of Modeling NOx Formation Arising from the Combustion of 100% Wood in a Pulverized Fuel Furnace

Over the last decade there has been considerable interest in modeling the co-combustion of coal and biomass with biomass levels up to about 20 wt%. Because of increasing environmental concern about the emission of CO2, there has recently been a move in some countries to use near 100% of biomass. This action has raised a number of issues, and one of these is the control of the NOx formed. The factors relating to the formation and in-furnace control of NOx from wood are considered in this article, and it is concluded that the main route is via HCN.