Researches And Simulation On Hydrogen Low-NOx Combustion Characteristics

The double puzzle of energy and environment make a good significance of hydrogen research. Although hydrogen is a clean fuel, there is nitrogen oxides harmful for environment and human. So it is necessary to know more about the produced mechanism of nitrogen oxides and low-NOx emission in hydrogen combustion.In this paper, the whole premixed combustion, adapting the ratio of N₂, air-staged combustion, rich-lean combustion and so on are studied to see about produced characteristics of nitrogen oxides. Among of them rich-lean combustion has lower nitrogen oxides emission, which is studied through controlling the equivalence ratio of air and hydrogen in rich and lean sides, except of whole equivalence ratio. At the same time, temperature and reaction time in combustion region, which afford theory and data for control nitrogen oxides emission latter. Furthermore, to minish the ratio of N₂ can reduce nitrogen oxides emission,Secondly, hydrogen-methane premixed combustion is studied aim at the actuality of hydrogen making and hydrogen storage problem and so on, to see about preliminarily adding hydrogen effect on methane combustion and pollution emission with the purpose of seeking availability combustion wise to lower pollution emission effectively.Last, the NH₃ and HCN effect on nitrogen oxides emission in hydrogen reburning is studied in this paper. The result represents nitrogen oxides emission is lower in NH₃ atmosphere and more in HCN atmosphere the other way round.