Chemical composition of acid–base fractions separated from biooil derived by fast pyrolysis of chicken manure |
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| Authors: | Dharani D Das Morris I Schnitzer Carlos M Monreal Paul Mayer |
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| Institution: | aEastern Cereal and Oil Seed Research Centre, Agriculture and Agri-Food Canada, 960 Carling Avenue, Ottawa, ON, Canada K1A 0C6;bDepartment of Chemistry, University of Ottawa, 10 Marie-Curie, Ottawa, ON, Canada K1N 6N5 |
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| Abstract: | Our earlier investigations on the chemical composition of biooils derived by the fast pyrolysis of chicken manure revealed the presence of more than 500 compounds. In order to simplify this heterogeneous and complex chemical system, we produced four biooil fractions namely strongly acidic fraction A, weakly acidic fraction B, basic fraction C and neutral fraction D on the basis of their solubilities in aqueous solutions at different pHs. The yield (wt/wt.%) for fraction A was 3%, for fraction B 21.3%, for fraction C 2.4% and for fraction D 32.4%, respectively. The four fractions were analyzed by elemental analyses, Fourier Transform infrared spectrophotometry (FTIR), 1H and 13C nuclear magnetic spectroscopy (NMR), and electrospray ionization mass spectrometry (ESI-MS). The major components of the four fractions were saturated and unsaturated fatty acids, N-heterocyclics, phenols, sterols, diols and alkylbenzenes. The pH separation system produced fractions of enhanced chemical homogeneity. |
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| Keywords: | Biooil Fatty acids Heterocyclic-N Sterols Long-chain aliphatics |
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