Control of Nitrogen Oxides in Oxy-Fuel Combustion

摘要

Oxy-fuel combustion is an emerging combustion technology for capture of carbon dioxide. This technology also creates new conditions for formation of NO_x. The present work summarizes the experimental and modelling work performed at Chalmers University of Technology on nitrogen chemistry in oxy-fuel combustion. The major conclusions are that emission of NO_x in oxy-fuel combustion strongly depends on the reduction of recycled NO by hydrocarbon radicals (reburning) in the flame zone. Furthermore, the elimination of air-borne nitrogen in oxy-fuel combustion creates an opportunity to reverse the Zeldovich mechanism in order to reduce NO_x instead of producing thermal NO_x.