【摘要】 为探究氨燃料减少温室气体（GHG）排放的效益，克服氨点火能量较高、层流火焰速度较慢的缺点,使用Chemkin构建化学反应器网格（CRN）仿真模型对低比例甲醇（0～10%）与氨掺混燃烧进行组分演化、产物生成速率和敏感性分析,利用化学反应动力学，分析N₂O生成和还原机理。结果表明：纯氨燃烧在当量比为1.1～1.2时，可同时降低NO、未燃NH₃和N₂O的排放，较纯甲醇燃烧可减少70%以上的温室气体排放；当量比超过0.9时，氨燃烧的GHG排放始终低于纯甲醇燃烧。加入甲醇能有效控制N₂O生成，进一步降低GHG排放。在富燃条件下，甲醇的添加促进了H的生成，使N₂O消耗增加；在贫燃条件下，甲醇的增强抑制了NH的生产，使N₂O生成降低。另外，提高压力和温度也能有效降低温室气体排放。更多还原

【Abstract】 In order to investigate the benefits of ammonia fuel in reducing greenhouse gas （GHG） emissions,and overcome the shortcomings of high ammonia ignition energy and slow laminar flame speed,a chemical reactor network （CRN） model of the combustion of methanol-ammonia mixtures was developed using Chemkin to analyze the component evolution,product generation rate and sensitivity of low proportion methanol （0～10%）and ammonia combustion.Chemical reaction kinetics was used to analyze the N₂O generation/reduction mechanism.The results show that pure ammonia combustion at equivalence ratios of 1.1-1.2 can concurrently decrease emissions of NO,unburned NH₃,and N₂O,resulting in a reduction of over 70%in GHG emissions compared to pure methanol combustion.Ammonia combustion remains beneficial for GHG emission control when the equivalence ratio exceeds 0.9.Methanol addition effectively controls N₂O generation,further mitigating GHG emissions.Under rich combustion conditions,methanol addition promotes H generation,leading to increased N₂O consumption.However,under lean combustion conditions,methanol enhances the suppression of NH production,resulting in reduced N₂O generation.Moreover,increasing pressure and temperature can effectively reduce GHG emissions,although the mechanisms vary.更多还原