Model Compound Study of the Pathways for Aromatic Hydrocarbon Formation in Soot
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- 作者：Randall E. Winans ; Nancy A. Tomczyk ; Jerry E. Hunt ; Mark S. Solum ; Ronald J. Pugmire ; Yi Jin Jiang ; Thomas H. Fletcher
- 刊名：Energy & Fuels
- 出版年：2007
- 出版时间：September 2007
- 年：2007
- 卷：21
- 期：5
- 页码：2584 - 2593
- 全文大小：331K
- 年卷期：v.21,no.5(September 2007)
- ISSN：1520-5029
文摘
As a follow-up of previous work on the flame pyrolysis of biphenyl and pyrene, a more detailed analysisof the pyrolytic products has been done using additional NMR data obtained on the whole soot sample correlatedwith detailed high-resolution and GC mass spectrometry data on the solvent-extracted portion of the samesamples. These latter data complement the earlier NMR data with details of the pre-sooting structures, referredto as "young soot", in pyrolyzed biphenyl samples collected at 1365, 1410, and 1470 K and pyrene at 1410and 1470 K. The data reveal the roles played by free-radical-assisted polymerization reactions as well as thehydrogen-abstraction carbon-addition (HACA) reactions for the biphenyl pyrolysis. The mass spectroscopydata of pyrene describe a much different set of reactions due to polymerization which employs free-radicalreactions of the pyrene due primarily to hydrogen abstraction followed by the formation of biaryl linkages atmass numbers up to five times that of the parent pyrene. Conceptual schema of reaction mechanisms areproposed to explain the formation pathways to materials detected in the soot extracts.