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利用同步辐射真空紫外光电离质谱结合分子束取样技术研究了燃烧当量比为0.8的2,5-二甲基呋喃(DMF)/氧气/氩气低压层流预混火焰中的初级燃烧产物,得到了DMF火焰的光电离质谱和燃烧中间产物的光电离效率曲线,从光电离效率曲线得到了相应分子/自由基的电离能,将实验测量得到的电离能与文献值或者利用量子化学方法计算得到的理论值比较,确定了DMF火焰中燃烧中间产物的化学结构,包括尚未报道的DMF的氧化产物和更高级的衍生物,并根据这些燃烧中间产物的化学结构推断和分析了DMF及其初级燃烧产物的生成与消耗过程.
The primary combustion products in a low-pressure laminar flow of 2,5-dimethylfuran (DMF) / oxygen / argon laminar flow with a combustion equivalence ratio of 0.8 were studied by using synchrotron radiation vacuum ultraviolet photoionization mass spectrometry combined with molecular beam sampling technique. The photoionization mass spectrum of DMF flame and the photoionization efficiency curve of the combustion intermediate were obtained. The ionization energy of the corresponding molecule / radical was obtained from the photoionization efficiency curve. The ionization energy obtained from the experiment was calculated with the literature value or by quantum chemical method , The chemical structures of the combustion intermediates in the DMF flame were determined, including the unreported DMF oxidation products and higher derivatives. The chemical structure of these combustion intermediates was used to infer and analyze the DMF and its primary combustion Product generation and consumption process.