Abstract
Fuels from Japan, Senegal, and Turkey were investigated to determine the organic nitrogen content. The organic nitrogen compounds were isolated by mild acid extraction followed by silica gel adsorption. Three extracts were obtained from each sample: a basic nitrogen extract in methylene chloride (BNC); a non-basic nitrogen extract in methylene chloride (NBNC); and a non-basic nitrogen extract in methanol (NBNC). The constituents of each extract were determined by high-resolution gas chromatography/mass spectrometry (GC/MS). Common nitrogen compounds identified were pyridines, tetrahydroquinolines (THQs), quinolines, indoles, pyrroles, and carbazoles. The largest number of compounds identified in all three fuels was the pyrroles, followed by the indoles and pyridines, carbazoles, quinolines, and THQs.
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