Extraction of phenols from bio-oil aqueous fraction by hydrophobic ionic liquids

DENG Jing-jing; LUO Ze-jun; WANG Chu; ZHU Xi-feng

doi:10.1016/S1872-5813(21)60108-1

Volume 49 Issue 12

Dec. 2021

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Article Navigation > Journal of Fuel Chemistry and Technology > 2021 > 49(12): 1832-1838

DENG Jing-jing, LUO Ze-jun, WANG Chu, ZHU Xi-feng. Extraction of phenols from bio-oil aqueous fraction by hydrophobic ionic liquids[J]. Journal of Fuel Chemistry and Technology, 2021, 49(12): 1832-1838. doi: 10.1016/S1872-5813(21)60108-1

Citation:

DENG Jing-jing, LUO Ze-jun, WANG Chu, ZHU Xi-feng. Extraction of phenols from bio-oil aqueous fraction by hydrophobic ionic liquids[J]. Journal of Fuel Chemistry and Technology, 2021, 49(12): 1832-1838. doi: 10.1016/S1872-5813(21)60108-1

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Extraction of phenols from bio-oil aqueous fraction by hydrophobic ionic liquids

doi: 10.1016/S1872-5813(21)60108-1

School of Engineering Science, University of Science and Technology of China, Hefei 230026, China

Funds: The project was supported by the National Key Research and Development Program of China (2018YFB1501404)

Received Date: 2021-03-03
Rev Recd Date: 2021-04-22

Available Online: 2021-05-18

Publish Date: 2021-12-29

Abstract

Abstract

Acetic acid, phenol, guaiacol and 4-methylguaiacol in bio-oil aqueous fraction were extracted and separated experimentally with the choice of hydrophobic ionic liquid [Bmim][NTf₂] as extractant. The effects of extraction time and extractant dosage on the extraction efficiency were explored. With the help of density functional theory (DFT) calculations, the interaction mechanism between [Bmim][NTf₂] and phenol was also clarified. The results showed that under the optimal extraction condition (m_IL/m_W = 0.4, extraction time = 5 min), the extraction efficiencies of acetic acid, phenol, guaiacol and 4-methylguaiacol in the aqueous fraction were 2.71%, 95.41%, 92.04%, and 97.98%, respectively. It was indicated that [Bmim][NTf₂] had better selectivity and superior extraction efficiency for phenols in bio-oil aqueous fraction. The results of DFT calculation demonstrated that the strong hydrogen bonding interaction as well as weak vdW interaction between [Bmim][NTf₂] and phenols played an important role in extraction and dephenolization of bio-oil aqueous fraction. The phenols in [Bmim][NTf₂] can be effectively removed by alkali washing treatment to achieve recovery of [Bmim][NTf₂] and next high efficiency extraction.
- bio-oil,
- ionic liquids,
- extraction,
- phenols,
- hydrogen bonding

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References(33)

References

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