Publication Date:
2005-05-14
Description:
Models for chemical mechanisms of hydrocarbon oxidation rely on spectrometric identification of molecular structures in flames. Carbonyl (keto) compounds are well-established combustion intermediates. However, their less-stable enol tautomers, bearing OH groups adjacent to carbon-carbon double bonds, are not included in standard models. We observed substantial quantities of two-, three-, and four-carbon enols by photoionization mass spectrometry of flames burning representative compounds from modern fuel blends. Concentration profiles demonstrate that enol flame chemistry cannot be accounted for purely by keto-enol tautomerization. Currently accepted hydrocarbon oxidation mechanisms will likely require revision to explain the formation and reactivity of these unexpected compounds.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Taatjes, Craig A -- Hansen, Nils -- McIlroy, Andrew -- Miller, James A -- Senosiain, Juan P -- Klippenstein, Stephen J -- Qi, Fei -- Sheng, Liusi -- Zhang, Yunwu -- Cool, Terrill A -- Wang, Juan -- Westmoreland, Phillip R -- Law, Matthew E -- Kasper, Tina -- Kohse-Hoinghaus, Katharina -- New York, N.Y. -- Science. 2005 Jun 24;308(5730):1887-9. Epub 2005 May 12.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Combustion Research Facility, Mail Stop 9055, Sandia National Laboratories, Livermore, CA 94551-0969, USA. cataatj@sandia.gov〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/15890844" target="_blank"〉PubMed〈/a〉
Print ISSN:
0036-8075
Electronic ISSN:
1095-9203
Topics:
Biology
,
Chemistry and Pharmacology
,
Computer Science
,
Medicine
,
Natural Sciences in General
,
Physics
