Mechanism Of Nitrogen Conversion During Coal And Coal Macerals Pyrolysis And Gasification

Coal is an abundant fossil energy in the world, and is used as a reliable and cheap energy source to produce electricity or syngas. However, the utilization of coal had led to the serious environmental problems, such as emissions of greenhouse gases, oxides of nitrogen and oxides of sulphur. NO_X (NO and NO₂) is among the most important air pollutants, it contributes to the formation of acid rain and photochemical smog. N₂O can destruct ozone. So, a new technology for coal utilization with less release of NO_X is demanded urgently.The development of clean coal utilization technologies has required deeper understanding of mechnism of NO_X formation. However, the mechanism by which coal-N is converted into NO_X is imperfectly understood at present. There have been a lot of disagreements reported in literature, especially for the formation of NH₃. The main purpose of this thesis is to investigate the rule of nitrogen conversion during pyrolysis and gasification of...