Abstract
Owing to instabilities, very little has been accomplished with regard to simple cost-effective separations of fast pyrolysis bio-oil. However, recent developments in the use of tail-gas reactive pyrolysis (TGRP) (Mullen, C. A.; Boateng, A. A.; Goldberg, N. M. Energy Fuels 2013.) provide higher quality bio-oils that are thermally stable. We used fractional distillation to isolate compounds from bio-oil produced by TGRP. All bio-oils produced from TGRP contained significantly less acid (0.2–4% total), trace amounts of aldehydes, and significantly higher concentrations of hydrocarbons and phenolics (5–20% each). One TGRP bio-oil rich in naphthalenes yielded the greatest mass of distillates (close to 65%). Using atmospheric distillation alone, we recovered the most distillates from another phenol-rich TGRP oil. Compared to traditional bio-oils, distillation of TGRP oils yielded three times more organic compounds; the yield improvement increases to a factor of 10 when the contribution of acetic acid is removed...
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