A1 Journal article (refereed)
Analysis of Lipophilic Extractives from Fast Pyrolysis Bio-Oils (2022)

Ohra-aho, T., Ghalibaf, M., Alén, R., Lindfors, C., & Oasmaa, A. (2022). Analysis of Lipophilic Extractives from Fast Pyrolysis Bio-Oils. Energy and Fuels, 36(11), 5797-5804. https://doi.org/10.1021/acs.energyfuels.1c04325

JYU authors or editors

Publication details

All authors or editors: Ohra-aho, Taina; Ghalibaf, Maryam; Alén, Raimo; Lindfors, Christian; Oasmaa, Anja

Journal or series: Energy and Fuels

ISSN: 0887-0624

eISSN: 1520-5029

Publication year: 2022

Publication date: 16/05/2022

Volume: 36

Issue number: 11

Pages range: 5797-5804

Publisher: American Chemical Society (ACS)

Publication country: United States

Publication language: English

DOI: https://doi.org/10.1021/acs.energyfuels.1c04325

Publication open access: Openly available

Publication channel open access: Partially open access channel

Publication is parallel published (JYX): https://jyx.jyu.fi/handle/123456789/81227

Abstract

Fast pyrolysis bio-oils (FPBOs) originating from forest residues contain extractive-derived substances, which may form a separate, sticky layer with char particles on the surface of these bio-oils. In this study, first, the removal of extractive-derived substances from the bio-oil top phase was studied by common solvents with different polarities. In this case, the results indicated that when aimed at the maximum yield of single-phase fuel oil and thus the maximum amount of extractives removed, the use of n-heptane or n-hexane seems to be of benefit for this purpose. For safety reasons, the use of n-heptane was recommended. Second, an analysis practice (extraction time and the way of mixing) was optimized. In order to reduce the extraction time and enhance the extraction yield, it was important to break the oil surface in extraction. Third, based on the characterization results of the n-heptane extract by gas chromatography and ultraviolet spectroscopy, the detected compounds were classified as fatty acids, resin acids, esterified fatty acids, terpenoids, and steroids, and their total content (27 wt %) was lower than that of lignin-derived compounds (70 wt %). The extraction of the FPBO top phase with n-heptane followed by this analysis practice was a useful way to estimate the content and composition of lipophilic extractives.

Keywords: biofuels; pyrolysis oil; extraction (chemistry); chromatography

Free keywords: extraction; biofuels; chromatography; lipids; solvents

Contributing organizations

Ministry reporting: Yes

Reporting Year: 2022

JUFO rating: 1