Recovery of renewable phenolic fraction from pyrolysis oil

Recovery of renewable phenolic fraction from pyrolysis oil

► Recovery of phenolics from bio-oil using two slightly different starts was studied. ► Effect of aqueous to bio-oil ratio on distribution coefficients of phenolics was examined. ► Water, aqueous sodium bisulphite solution or alkali solution were used. ► Alkali extraction is more efficient then wate...

Full description

Saved in:
Bibliographic Details
Published in:Separation and purification technology Vol. 86; pp. 157 - 170
Main Authors: FELE ZILNIK, Ljudmila, JAZBINSEK, Alma
Format: Journal Article
Language:English
Published: Kidlington Elsevier B.V 15-02-2012
Elsevier
Subjects:
acetates
Applied sciences
Aqueous extraction
aqueous solutions
biofuels
Chemical engineering
Distribution coefficient
European Union
Exact sciences and technology
oils
phenolic compounds
Phenolic fraction
plant residues
pyrolysis
Pyrolysis oil
sodium hydroxide
solvents
Solvent–anti-solvent technique
wood
Pyrolysis oil
Solvent–anti-solvent technique
Distribution coefficient
Phenolic fraction
Aqueous extraction
Solvent-anti-solvent technique
Pyrolysis
Forests
Wood
Polar solvent
Separation process
Aqueous solution
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:► Recovery of phenolics from bio-oil using two slightly different starts was studied. ► Effect of aqueous to bio-oil ratio on distribution coefficients of phenolics was examined. ► Water, aqueous sodium bisulphite solution or alkali solution were used. ► Alkali extraction is more efficient then water or aqueous sodium bisulphite solution. ► MIBK was found to be more selective organic solvent in comparison to acetates. The aim of this work was to develop a separation process for phenolic fraction recovery from various bio-oils, produced by fast pyrolysis process of wood and forest residues in the framework of the EU Project BIOCOUP. Two slightly different schemes were introduced, namely the first one starting with an aqueous extraction of pyrolysis oil and the second one with the simultaneous use of a hydrophobic-polar solvent and anti-solvent in the extraction of bio-oil. In both cases the distribution coefficients of phenolic components between the phases as well as extraction factors for major separation stages are presented. Different aqueous solutions were applied and alkali solution was found to be more efficient in comparison to water or aqueous NaHSO3 solution. From various hydrophobic-polar solvents which had been tested, methyl isobutyl ketone (MIBK) was shown to be the most efficient solvent for extraction of phenolics from bio-oil in combination with 0.1 or 0.5M aqueous NaOH solution, followed by butyl acetate.
Bibliography:http://dx.doi.org/10.1016/j.seppur.2011.10.040
ISSN:1383-5866
1873-3794
DOI:10.1016/j.seppur.2011.10.040