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Separation and identification of heterocyclic nitrogen compounds in biooil derived by fast pyrolysis of chicken manure

Kazi, Z.H., Schnitzer, M.I., Monreal, C., Mayer, P. (2011). Separation and identification of heterocyclic nitrogen compounds in biooil derived by fast pyrolysis of chicken manure, 46(1), 51-61. http://dx.doi.org/10.1080/03601234.2010.515506

Abstract

N-heterocyclics were separated from a biooil, generated by the pyrolysis of chicken manures by column chromatography over neutral alumina and silica, and identified by Pyrolysis Field Ionization Mass Spectrometry (Py-FIMS) and Electrospray Ionization Mass Spectrometry (ESI-MS). Identities of chemical structures, whose presence was indicated by ESI-MS, were confirmed by comparing the Collision-Induced Dissociations (CID's) mass spectra of unknown and standards. The following seven base structures were identified: pyrazine, benzoquinoline, carbazole, phenylpyridine, indole, pyrazole and pyridine. Available hydrogens bonded to ring carbons and nitrogens on the seven N-heterocyclics were increasingly substituted by alkyl groups, mainly methylene groups (m/z 14) to yield mono-, di-, tri- methyl N-heterocyclics. In some instances, longer alkyl chains, such as ethyl, propyl, up to heptyl groups were the substituents. © Taylor & Francis Group, LLC.

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