The Structure of Hexane Soot I: Spectroscopic Studies

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Abstract:

Soot produced from the combustion of fossil fuels, widely distributed in the atmosphere, is significantly different from most carbons for which the surface structure and/or reactivity have been studied. The composition and surface structure of soot derived from the combustion of n-hexane have been examined by FT-IR, Raman, 13C CP/MAS NMR, and EPR spectroscopies as well as through desorption measurements. Carbon-oxygen functionalities on the fresh carbon surface include acid anhydride, a carbonyl conjugated with an aromatic segment, an alkylketone, and aryl ether linkages. Also present, confirmed by isotopic substitution, is a quantity of unsaturated C-H, dependent upon the combustion conditions. The degree of aromaticity and the graphitic nature of this soot have been determined.

Keywords: Carbon; Combustion; Fuels; Soot

Document Type: Research Article

DOI: http://dx.doi.org/10.1366/0003702854249114

Affiliations: Department of Chemistry, University of Denver, Denver, Colorado 80208

Publication date: January 1, 1985

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