Studies on Nitrogen Oxides (NOx and N2O) in Pressurized Fluidized Bed Combustion

摘要

This thesis describes the experimental studies of nitrogen oxide (NO, NO2, N2O)emissions in pressurized fluidized bed combustion (PFBC). In the first part of the thesis the background and the objectives of this study are introduced. The second part summarizes the fundamental knowledge about the formation and destruction of nitrogen oxides in coal combustion, particularly in the conditions of PFBC. The instrumentation of test facilities, measurement and data analysis is described in the third part. Then the most important experimental results follow in the next parts. The fourth part describes the results from a PFBC test rig and an empirical modelling for predicting the emissions of NOx and N2O. Funally, the fundamental work on coal combustion and fuel nitrogen conversion in a PFBC batch reactor is presented. These studies clearly confirm the potential of PFBC technology in the control nitrogen of oxide emissions.