Toward a circular bioeconomy: extracting cellulose from grape stalks

Liliana Araújo; Adriana R. Machado; Manuela Pintado; Eduarda Vieira; Patrícia Moreira

doi:10.3390/ECP2023-14746

Toward a circular bioeconomy: extracting cellulose from grape stalks

Liliana Araújo^*, Adriana R. Machado, Manuela Pintado, Eduarda Vieira, Patrícia Moreira

^*Corresponding author for this work

Research output: Contribution to journal › Conference article › peer-review

4 Citations (Scopus)

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Abstract

The purpose of this study was to assess the extraction of cellulose from stalks of vines using auto-hydrolysis and characterize it. As the results obtained, the colorimeter readings displayed a final yellow color of the fiber, demonstrating that the bleaching process was insufficient and that multiple bleaching processes might be required. According to the FTIR (Fourier-transform infrared spectroscopy) data, there were stretching and deformation vibrations of characteristic peak that represent cellulose (2900, 1500, and 1200 cm−1). Although lignin and hemicellulose were partially removed according to the FTIR, distinct cellulose yields were achieved for each fraction, including fractions 500, 300, 250, 150 µm, and retain, with values of 21.98, 12.70, 7.20, 5.74, and 3.11%, respectively. In sum, we were able to extract cellulose from the stalk vine, although the last step still needs to be optimized for better whitening.

Original language	English
Article number	86
Pages (from-to)	1-7
Number of pages	7
Journal	Engineering Proceedings
Volume	37
Issue number	1
DOIs	https://doi.org/10.3390/ECP2023-14746
Publication status	Published - Jul 2023
Event	The 2nd International Electronic Conference on Processes: Process Engineering : Current State and Future Trends - Duration: 17 May 2023 → 31 May 2023

Keywords

Acid hydrolysis
Alkaline hydrolysis
Color
Fiber and size

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10.3390/ECP2023-14746Licence: CC BY

95807646Final published version, 1.79 MBLicence: CC BY

http://hdl.handle.net/10400.14/44359Licence: CC BY

Cite this

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title = "Toward a circular bioeconomy: extracting cellulose from grape stalks",

abstract = "The purpose of this study was to assess the extraction of cellulose from stalks of vines using auto-hydrolysis and characterize it. As the results obtained, the colorimeter readings displayed a final yellow color of the fiber, demonstrating that the bleaching process was insufficient and that multiple bleaching processes might be required. According to the FTIR (Fourier-transform infrared spectroscopy) data, there were stretching and deformation vibrations of characteristic peak that represent cellulose (2900, 1500, and 1200 cm−1). Although lignin and hemicellulose were partially removed according to the FTIR, distinct cellulose yields were achieved for each fraction, including fractions 500, 300, 250, 150 µm, and retain, with values of 21.98, 12.70, 7.20, 5.74, and 3.11%, respectively. In sum, we were able to extract cellulose from the stalk vine, although the last step still needs to be optimized for better whitening.",

keywords = "Acid hydrolysis, Alkaline hydrolysis, Color, Fiber and size",

author = "Liliana Ara{\'u}jo and Machado, {Adriana R.} and Manuela Pintado and Eduarda Vieira and Patr{\'i}cia Moreira",

note = "Publisher Copyright: {\textcopyright} 2023 by the authors.; The 2nd International Electronic Conference on Processes : Process Engineering : Current State and Future Trends, ECP 2023 ; Conference date: 17-05-2023 Through 31-05-2023",

year = "2023",

month = jul,

doi = "10.3390/ECP2023-14746",

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T1 - Toward a circular bioeconomy

T2 - The 2nd International Electronic Conference on Processes

AU - Araújo, Liliana

AU - Machado, Adriana R.

AU - Pintado, Manuela

AU - Vieira, Eduarda

AU - Moreira, Patrícia

PY - 2023/7

Y1 - 2023/7

N2 - The purpose of this study was to assess the extraction of cellulose from stalks of vines using auto-hydrolysis and characterize it. As the results obtained, the colorimeter readings displayed a final yellow color of the fiber, demonstrating that the bleaching process was insufficient and that multiple bleaching processes might be required. According to the FTIR (Fourier-transform infrared spectroscopy) data, there were stretching and deformation vibrations of characteristic peak that represent cellulose (2900, 1500, and 1200 cm−1). Although lignin and hemicellulose were partially removed according to the FTIR, distinct cellulose yields were achieved for each fraction, including fractions 500, 300, 250, 150 µm, and retain, with values of 21.98, 12.70, 7.20, 5.74, and 3.11%, respectively. In sum, we were able to extract cellulose from the stalk vine, although the last step still needs to be optimized for better whitening.

AB - The purpose of this study was to assess the extraction of cellulose from stalks of vines using auto-hydrolysis and characterize it. As the results obtained, the colorimeter readings displayed a final yellow color of the fiber, demonstrating that the bleaching process was insufficient and that multiple bleaching processes might be required. According to the FTIR (Fourier-transform infrared spectroscopy) data, there were stretching and deformation vibrations of characteristic peak that represent cellulose (2900, 1500, and 1200 cm−1). Although lignin and hemicellulose were partially removed according to the FTIR, distinct cellulose yields were achieved for each fraction, including fractions 500, 300, 250, 150 µm, and retain, with values of 21.98, 12.70, 7.20, 5.74, and 3.11%, respectively. In sum, we were able to extract cellulose from the stalk vine, although the last step still needs to be optimized for better whitening.

KW - Acid hydrolysis

KW - Alkaline hydrolysis

KW - Color

KW - Fiber and size

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JO - Engineering Proceedings

JF - Engineering Proceedings

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Y2 - 17 May 2023 through 31 May 2023

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Toward a circular bioeconomy: extracting cellulose from grape stalks

Abstract

Keywords

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CITAR: Research Center for Science and Technology of the Arts

HAC4CG: Heritage Art, Creation for Climate Change - Living the City: Catalyzing Spaces for Learning, Creation and Action Towards Climate Change

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Toward a circular bioeconomy: extracting cellulose from grape stalks

Abstract

Keywords

Access to Document

Other files and links

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Projects

CITAR: Research Center for Science and Technology of the Arts

HAC4CG: Heritage Art, Creation for Climate Change - Living the City: Catalyzing Spaces for Learning, Creation and Action Towards Climate Change

Cite this