合成气富氧燃烧和NO再燃反应机理评估与发展

Evaluation and Development of Reaction Mechanisms for Syngas Oxidation and NO Reburning Under Oxy-fuel Combustion

为了得到适用于富氧燃烧(高浓度CO)和烟气再循环(NO再燃)条件下合成气燃烧的简化机理,基于自主实验结果(558数据点)和大量文献数据(628数据点),对16种合成气详细反应机理在点火延迟时间、层流火焰速度和组分浓度三方面进行了定量评估。评估与发展所得综合最优机理Davis-PG-mod为146组分-809反应详细反应机理,同时适用于富氧和空气氛围。通过进一步系统简化得到16组分-12反应简化机理。结果表明:在空气和富氧气氛下,简化机理相对于详细机理误差均小于10%,且相较于详细机理实现了约37倍计算加速。

In order to obtain a simplified mechanism of syngas combustion suitable for oxy-fuel combustion(high COconcentration)and flue gas recirculation(NO reburning)conditions,16 detailed reaction mechanisms of syngas were quantitatively evaluated in terms of ignition delay time,laminar flame speed and component concentration.The study was based on the results of autonomous experiments(558 data points)and extensive literature data(628 data points).The comprehensive optimal mechanism Davis-PG-mod obtained from the evaluation and development was the 146-component and 809-reaction,which was suitable for both oxygen-enriched and air atmospheres.Then the simplified mechanism of 16-component and 12-reaction was obtained by further system simplification.Results show that under air and oxygen-enriched conditions,the error of the simplified mechanism is less than 10%,and the calculation speedup is about 37 times compared with the detailed mechanism.