A. Ozcan et al., Structural analysis of bio-oils from fixed-bed pyrolysis of Euphorbia rigida and sunflower pressed bagasse, ENERG SOURC, 22(9), 2000, pp. 809-824
Fixed-bed tars of Euphorbia rigida and sunflower pressed bagasse have been
investigated for their structures. These mrs were fractionated into pentane
-soluble and -insoluble compounds (asphaltenes). Pentane soluble were then
solvent fractionated into pentane, toluene, ether and methanol subfractions
by fractionated column chromatography. The aliphatic and low-molecular-wei
ght aromatic subfractions of the bio-oils were then analyzed by capillary c
olumn gas-liquid chromatography and GC/MS. Further structural analysis of b
io-oils and aromatic and polar subfractions were conducted to FTIR and H-1-
NMR spectra.