Abstract

Methyl methacrylate (MMA) is the main pyrolysis product of the widely used polymer polymethyl methacrylate; therefore, a compact mechanism of MMA oxidation is of interest for CFD modeling of flame propagation over this polymer. A reduced mechanism of MMA combustion consisting of 263 elementary reactions involving 66 species was developed based on a detailed chemical-kinetic mechanism of MMA oxidation in flames using Chemical Workbench software. The developed mechanism was validated against experimental data on the speed of premixed MMA/air flame at an equivalence ratio \(0.9 < \phi < 1.3\) and against literature data on the structure of a MMA/O₂/Ar (\(\phi\) = 1) flame stabilized on a flat burner at a pressure of 1 atm. The proposed reduced kinetic model for MMA describes the experimental data with satisfactory accuracy, and the modeling results for the full and reduced mechanisms of MMA oxidation are in good agreement with each other in terms of the concentrations of the major flame species and the concentrations of most combustion intermediates, including hydrogen, methane, ethylene, acetylene, propane, acetaldehyde, methyl acrylate, etc.

中文翻译：

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大气压下火焰中甲基丙烯酸甲酯氧化的还原化学动力学机理

摘要

甲基丙烯酸甲酯（MMA）是广泛使用的聚合物聚甲基丙烯酸甲酯的主要热解产物。因此，对于CFD模拟火焰在该聚合物上的传播，感兴趣的是MMA氧化的紧凑机理。使用化学工作台软件，根据火焰中MMA氧化的详细化学动力学机理，开发了一种MMA燃烧的还原机理，该机理由263个基本反应组成，涉及66种物质。针对当量比\（0.9 <\ phi <1.3 \）下的预混MMA /空气火焰速度的实验数据以及针对MMA / O ₂ / Ar（\（\ phi \） = 1）火焰稳定在平面燃烧器上，压力为1 atm。所提出的MMA还原动力学模型以令人满意的精度描述了实验数据，并且就主要火焰种类的浓度和大多数火焰种类的浓度而言，MMA氧化的完整机理和还原机理的建模结果彼此吻合良好。燃烧中间体，包括氢气，甲烷，乙烯，乙炔，丙烷，乙醛，丙烯酸甲酯等。