Influence of zinc chloride addition on the chemical structure of bio-oil obtained during co-pyrolysis of wood/synthetic polymer blends.
The chemical structure of liquid products of the pinewood sawdust (W) co-pyrolysis with polystyrene (PS) and polypropylene (PP) with and without the zinc chloride as an additive was investigated. The pyrolysis process was carried out at 450 degrees C with the heating rate of 5 degrees C/min. The yield of liquid products of pyrolysis was in the range of 37-91 wt% and their form was liquid or semi-solid depending on the composition of the wood/polymer blend. The zinc chloride addition to wood/polymer blends has influenced the range of samples decomposition as well as the chemical structure of resulted bio-oils. All bio-oils from wood/polypropylene blends were two-phase (liquid and solid). Contrarily, all bio-oils obtained from biopolymer/polypropylene blends with zinc chloride added were yellow liquids. All analyses proved that the structure and the quality of bio-oil strongly depend on both the composition of the blend and the presence of ZnCl(2) as an additive. The FT-IR analyses of oils showed that oxygen-containing groups and hydrocarbons content highly depend on the composition of biomass/synthetic polymer mixture. The fractionation of bio-oils by column chromatography with four different solvents was followed by GC-MS analysis. Results confirmed the significant removal and/or transformation of oxygen-containing organic compounds due to the zinc chloride presence during pyrolysis process.
Rutkowski
Piotr
P
Faculty of Chemistry, Wrocław University of Technology, Gdańska 7/9, 50-344 Wrocław, Poland. piotr.rutkowski@pwr.wroc.pl
D000473:Alkanes / Q000032:analysis; D000475:Alkenes / Q000032:analysis; D018533:Biomass; D002712:Chlorides / Q000737:chemistry*; D008401:Gas Chromatography-Mass Spectrometry; D009821:Oils / Q000737:chemistry*; D017601:Oxygen Compounds / Q000032:analysis; D011108:Polymers / Q000737:chemistry*; D017550:Spectroscopy, Fourier Transform Infrared; D014934:Wood / Q000737:chemistry*; D017967:Zinc Compounds / Q000737:chemistry*
D000473:Alkanes; D000475:Alkenes; D002712:Chlorides; D009821:Oils; D017601:Oxygen Compounds; D011108:Polymers; D017967:Zinc Compounds; C016837:zinc chloride