DISTRIBUTION OF FUEL NITROGEN IN PYROLYSIS PRODUCTS USED FOR REBURNING

This report describes the nitrogen distribution in coal pyrolysis at d ifferent temperatures and oxygen partial pressures to allow discussion of the influence of different gas components on the DeNOx capability of the pyrolysis gases and tar species. Test runs with nitrogen-free r eburn fuels and with coal pyrolysis gas showed that the nitrogen conce ntration, especially in the tar components of the pyrolysis gas, appea rs to have a positive effect on NOx reduction in the reburn zone of th e combustion reactor. (C) 1997 Elsevier Science Ltd.