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Effects of ethanol concentration on organosolv lignin precipitation and aggregation from Miscanthus x giganteus

This work assesses the behavior of organosolv lignin aggregates derived from Miscanthus x giganteus using different ethanol concentrations (10%, 25%, 50%, and 75% by volume). The percentage of lignin recovery was found to decrease from 75.8% to 71.4% and 25.1%, as the ethanol concentration was incre...

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Main Authors: Hamzah, Muhammad Hazwan, Bowra, Steve, Cox, Philip
Format: Article
Language:English
Published: Multidisciplinary Digital Publishing Institute 2020
Online Access:http://psasir.upm.edu.my/id/eprint/88701/1/ABSTRACT.pdf
http://psasir.upm.edu.my/id/eprint/88701/
https://www.mdpi.com/2227-9717/8/7/845
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spelling my.upm.eprints.887012021-11-03T21:55:52Z http://psasir.upm.edu.my/id/eprint/88701/ Effects of ethanol concentration on organosolv lignin precipitation and aggregation from Miscanthus x giganteus Hamzah, Muhammad Hazwan Bowra, Steve Cox, Philip This work assesses the behavior of organosolv lignin aggregates derived from Miscanthus x giganteus using different ethanol concentrations (10%, 25%, 50%, and 75% by volume). The percentage of lignin recovery was found to decrease from 75.8% to 71.4% and 25.1%, as the ethanol concentration was increased from 10% to 25% and 50%, respectively. Increasing the ethanol concentration further to 75% led to zero recovery. The purity of the precipitated lignin was consistently found to be ≥90%. Lignin derived from the dried supernatant obtained at 50% ethanol concentration resulted in high lignin purity (51.6%) in comparison with the other ethanol concentrations used. Fourier transform infrared spectroscopy analysis showed that the precipitated lignin and dried supernatant at 50% ethanol concentration possessed the highest peak intensity apportioned to wavenumber of lignin as compared to that of at 25% and 10% ethanol concentrations, and the results linked with the percentage of lignin purity. The results of particle size analysis for precipitated lignin demonstrated particle sizes of 306, 392, and 2050 nm for 10%, 25%, and 50% ethanol concentrations, respectively, and the remaining supernatant with average particle sizes of 1598, 1197, and 875 nm, respectively. These results were verified with the morphology of lignin macromolecules in scanning electron microscopy images. Results of the particle size distribution of lignin revealed that the overall size of lignin aggregates decreased with decreasing ethanol concentration. In summary, these findings suggest that ethanol concentration affected the behavior of lignin aggregates in water–ethanol solution. Multidisciplinary Digital Publishing Institute 2020 Article PeerReviewed text en http://psasir.upm.edu.my/id/eprint/88701/1/ABSTRACT.pdf Hamzah, Muhammad Hazwan and Bowra, Steve and Cox, Philip (2020) Effects of ethanol concentration on organosolv lignin precipitation and aggregation from Miscanthus x giganteus. Processes, 8 (7). art. no. 845. pp. 1-17. ISSN 2227-9717 https://www.mdpi.com/2227-9717/8/7/845 10.3390/pr8070845
institution Universiti Putra Malaysia
building UPM Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Putra Malaysia
content_source UPM Institutional Repository
url_provider http://psasir.upm.edu.my/
language English
description This work assesses the behavior of organosolv lignin aggregates derived from Miscanthus x giganteus using different ethanol concentrations (10%, 25%, 50%, and 75% by volume). The percentage of lignin recovery was found to decrease from 75.8% to 71.4% and 25.1%, as the ethanol concentration was increased from 10% to 25% and 50%, respectively. Increasing the ethanol concentration further to 75% led to zero recovery. The purity of the precipitated lignin was consistently found to be ≥90%. Lignin derived from the dried supernatant obtained at 50% ethanol concentration resulted in high lignin purity (51.6%) in comparison with the other ethanol concentrations used. Fourier transform infrared spectroscopy analysis showed that the precipitated lignin and dried supernatant at 50% ethanol concentration possessed the highest peak intensity apportioned to wavenumber of lignin as compared to that of at 25% and 10% ethanol concentrations, and the results linked with the percentage of lignin purity. The results of particle size analysis for precipitated lignin demonstrated particle sizes of 306, 392, and 2050 nm for 10%, 25%, and 50% ethanol concentrations, respectively, and the remaining supernatant with average particle sizes of 1598, 1197, and 875 nm, respectively. These results were verified with the morphology of lignin macromolecules in scanning electron microscopy images. Results of the particle size distribution of lignin revealed that the overall size of lignin aggregates decreased with decreasing ethanol concentration. In summary, these findings suggest that ethanol concentration affected the behavior of lignin aggregates in water–ethanol solution.
format Article
author Hamzah, Muhammad Hazwan
Bowra, Steve
Cox, Philip
spellingShingle Hamzah, Muhammad Hazwan
Bowra, Steve
Cox, Philip
Effects of ethanol concentration on organosolv lignin precipitation and aggregation from Miscanthus x giganteus
author_facet Hamzah, Muhammad Hazwan
Bowra, Steve
Cox, Philip
author_sort Hamzah, Muhammad Hazwan
title Effects of ethanol concentration on organosolv lignin precipitation and aggregation from Miscanthus x giganteus
title_short Effects of ethanol concentration on organosolv lignin precipitation and aggregation from Miscanthus x giganteus
title_full Effects of ethanol concentration on organosolv lignin precipitation and aggregation from Miscanthus x giganteus
title_fullStr Effects of ethanol concentration on organosolv lignin precipitation and aggregation from Miscanthus x giganteus
title_full_unstemmed Effects of ethanol concentration on organosolv lignin precipitation and aggregation from Miscanthus x giganteus
title_sort effects of ethanol concentration on organosolv lignin precipitation and aggregation from miscanthus x giganteus
publisher Multidisciplinary Digital Publishing Institute
publishDate 2020
url http://psasir.upm.edu.my/id/eprint/88701/1/ABSTRACT.pdf
http://psasir.upm.edu.my/id/eprint/88701/
https://www.mdpi.com/2227-9717/8/7/845
_version_ 1717095406915026944
score 13.211869

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