Modelling analysis of PAH and soot measured in a premixed toluene-doped methane flame
Modelling analysis of PAH and soot measured in a premixed toluene-doped methane flame
复制标题
DOI：
10.1016/j.fuel.2018.07.112
复制
发表时间：
2018-12
期刊：
影响因子：
7.4
通讯作者：
C. Russo;A. Ciajolo;A. D’Anna;M. Sirignano
中科院分区：
文献类型：
--
作者：
C. Russo;A. Ciajolo;A. D’Anna;M. Sirignano
采用详细的气相动力学模型，结合颗粒相的多截面方法，推导了甲苯添加对富燃料层流预混甲烷火焰烟尘结构的影响。通过对甲烷火焰和掺甲苯火焰在相似温度条件下燃烧气溶胶的详细分析，与模型预测值进行比较，评估了甲烷火焰和掺甲苯火焰燃烧气溶胶对进气成分微小变化的敏感性。模拟结果较好地预测了气相和颗粒相浓度。总体而言，观察到少量甲苯对甲烷火焰的煤烟产量和结构的影响，甲烷火焰强烈倾向于芳烃燃料典型的煤烟结构。实验证据和模拟结果表明，甲苯的添加显著影响了C2H2和PAH在现有颗粒或聚集体上的碳烟起始和表面生长的相对重要性。
A detailed gas-phase kinetic model coupled with a multi-sectional approach for the particle phase was used for inferring the effect of toluene addition on the sooting structure of a fuel-rich laminar premixed methane flame. Premixed methane flames at different C/O ratios established the reference environments to gain insight on the influence of toluene addition.Experimental data derived from a detailed analysis of the combustion aerosol sampled along the methane flame and the toluene-doped flame, burning in similar temperature conditions, were compared with the predictions of the model to assess its sensitivity to small changes in the fed mixture composition.Modeling results predicted reasonably well the gas- and the particle-phase concentrations. Overall, the effect of small amounts of toluene on the sooting yield and structure of the methane flame strongly tending toward the sooting structure typical of aromatic fuels, was observed. Experimental evidences and modeling results suggest that the relative importance of soot inception and surface growth by C2H2and PAH onto existing particles or aggregates is significantly affected by toluene addition.