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Title: Separation of chemical groups from bio-oil aqueous phase via sequential organic solvent extraction

Bio-oil aqueous phase contains a considerable amount of furans, alcohols, ketones, aldehydes and phenolics besides the major components of organic acids and anhydrosugars. The complexity of bio-oil aqueous phase limits its efficient utilization. To improve the efficiency of bio-oil biorefinery, this study focused on the separation of chemical groups from bio-oil aqueous phase via sequential organic solvent extractions. Due to their high recoverability and low solubility in water, four solvents (hexane, petroleum ether, chloroform, and ethyl acetate) with different polarities were evaluated, and the optimum process conditions for chemical extraction were determined. Chloroform had high extraction efficiency for furans, phenolics, and ketones. In addition to these chemical groups, ethyl acetate had high extraction efficiency for organic acids. The sequential extraction by using chloroform followed by ethyl acetate rendered that 62.2 wt.% of original furans, ketones, alcohols, and phenolics were extracted to chloroform, over 62 wt.% acetic acid was extracted to ethyl acetate, resulting in a high concentration of levoglucosan (~53.0 wt.%) in the final aqueous phase. Chemicals separated via the sequential extraction could be used as feedstocks in biorefinery using processes such as catalytic upgrading of furans and phenolics to hydrocarbons, fermentation of levoglucosan to produce alcohols and diols, andmore » hydrogen production from organic acids via microbial electrolysis.« less
Authors:
 [1] ;  [1] ;  [2]
  1. Univ. of Tennessee, Knoxville, TN (United States)
  2. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Publication Date:
Grant/Contract Number:
AC05-00OR22725; FOA-0000812; DEAC05-00OR22725
Type:
Accepted Manuscript
Journal Name:
Journal of Analytical and Applied Pyrolysis
Additional Journal Information:
Journal Volume: 123; Journal ID: ISSN 0165-2370
Publisher:
Elsevier
Research Org:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org:
USDOE Office of Energy Efficiency and Renewable Energy (EERE)
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY; 09 BIOMASS FUELS; bio-oil aqueous phase; organic solvent; solvent extraction; chemical groups
OSTI Identifier:
1356890
Alternate Identifier(s):
OSTI ID: 1416828

Ren, Shoujie, Ye, Philip, and Borole, Abhijeet P. Separation of chemical groups from bio-oil aqueous phase via sequential organic solvent extraction. United States: N. p., Web. doi:10.1016/j.jaap.2017.01.004.
Ren, Shoujie, Ye, Philip, & Borole, Abhijeet P. Separation of chemical groups from bio-oil aqueous phase via sequential organic solvent extraction. United States. doi:10.1016/j.jaap.2017.01.004.
Ren, Shoujie, Ye, Philip, and Borole, Abhijeet P. 2017. "Separation of chemical groups from bio-oil aqueous phase via sequential organic solvent extraction". United States. doi:10.1016/j.jaap.2017.01.004. https://www.osti.gov/servlets/purl/1356890.
@article{osti_1356890,
title = {Separation of chemical groups from bio-oil aqueous phase via sequential organic solvent extraction},
author = {Ren, Shoujie and Ye, Philip and Borole, Abhijeet P},
abstractNote = {Bio-oil aqueous phase contains a considerable amount of furans, alcohols, ketones, aldehydes and phenolics besides the major components of organic acids and anhydrosugars. The complexity of bio-oil aqueous phase limits its efficient utilization. To improve the efficiency of bio-oil biorefinery, this study focused on the separation of chemical groups from bio-oil aqueous phase via sequential organic solvent extractions. Due to their high recoverability and low solubility in water, four solvents (hexane, petroleum ether, chloroform, and ethyl acetate) with different polarities were evaluated, and the optimum process conditions for chemical extraction were determined. Chloroform had high extraction efficiency for furans, phenolics, and ketones. In addition to these chemical groups, ethyl acetate had high extraction efficiency for organic acids. The sequential extraction by using chloroform followed by ethyl acetate rendered that 62.2 wt.% of original furans, ketones, alcohols, and phenolics were extracted to chloroform, over 62 wt.% acetic acid was extracted to ethyl acetate, resulting in a high concentration of levoglucosan (~53.0 wt.%) in the final aqueous phase. Chemicals separated via the sequential extraction could be used as feedstocks in biorefinery using processes such as catalytic upgrading of furans and phenolics to hydrocarbons, fermentation of levoglucosan to produce alcohols and diols, and hydrogen production from organic acids via microbial electrolysis.},
doi = {10.1016/j.jaap.2017.01.004},
journal = {Journal of Analytical and Applied Pyrolysis},
number = ,
volume = 123,
place = {United States},
year = {2017},
month = {1}
}