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首页> 外文期刊>The journal of physical chemistry, A. Molecules, spectroscopy, kinetics, environment, & general theory >Pathways toward PAH Formation during Fatty Acid and Triglyceride Pyrolysis
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Pathways toward PAH Formation during Fatty Acid and Triglyceride Pyrolysis

机译：在脂肪酸和甘油三酯热解期间对PAH形成的途径

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Molecular beam mass spectrometry was used to follow model triglyceride pyrolysis with temperature. A selectively formed set of PAHs (276, 352, 444 amu) arose with increasing temperature. They were attributed to association of up to five C-7-C-8 sized fragments (observed in abundance by pyrolysis with gas chromatography), presumably due to their propensity to form stable benzyl radicals. Results were surprisingly similar regardless of triglyceride fatty acids (FAs), containing 0-2 C=C double bonds (14 to 18 carbon atoms). However, the absence of C=C double bonds shifted the process to higher temperatures. Shorter FA chains, particularly 14:0, enhanced generation of shorter size fragments, facilitating the alternate formation of nonselective PAH homolo series. An increase in the length of the glass wool filled sample stage enhanced the formation of two more PAHs, 316 and 388 amu. They appear to involve the formation of indenyl in addition to benzyl radicals as key intermediates.
机译：分子束质谱法遵循用温度的甘油三酯热解。 一种选择性地形成的一组PAH（276,352,444AMU）随着温度的增加而产生。 它们归因于多达五种C-7-C-8大小尺寸片段的关联（通过用气相色谱热解析以丰盈），可能是由于它们形成稳定苄基的倾向。 无论甘油三酯脂肪酸（FAS），含有0-2c = C双键（14至18个碳原子），结果令人惊讶的是相似。 然而，不存在C = C双键将过程转移到更高的温度。 较短的FA链，特别是14：0，增强的较短尺寸片段的产生，促进了非选择性PAH同源系列的交替形成。 玻璃棉填充样品阶段的长度的增加增强了两个更多PAHS，316和388 AMU的形成。 除了苄基作为关键中间体之外，它们似乎涉及形成茚基。

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