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Enhancing cellulose extraction from palm fronds using acidic and alkaline pretreatment: a kinetic study.

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Název: Enhancing cellulose extraction from palm fronds using acidic and alkaline pretreatment: a kinetic study.
Autoři: Abd, Athraa N., Shakor, Zaidoon M., Al-Zuhairi, Firas K., Al-Sheikh, Farooq, Kamel, Afraa H.
Zdroj: Reaction Kinetics, Mechanisms & Catalysis; Jun2025, Vol. 138 Issue 3, p1583-1604, 22p
Abstrakt: The present study employed alkali and acidic pretreatment methods to extract cellulose fibers from palm frond biomass. Also, the TGA is employed to quantify the proportions of the primary constituents: hemicellulose, cellulose, and lignin. Each of these components decomposes at a characteristic temperature, allowing for an estimation of their percentages in the sample. Three first-order independent parallel reactions were predicted having hemicellulose, cellulose, and lignin as the major constituents while multi-component kinetic modeling was applied to compute the kinetic parameters of each component, activation energy, and pre-exponential factor, at each peak temperature. As a result, One-dimensional Diffusion (D1) was found to be the best-representing TGA of the palm frond biomass decomposition. The compositions of palm frond waste were 31, 30.65, and 37.71% of hemicellulose, cellulose, and lignin. The obtained activation energies of the hemicellulose, cellulose, and lignin were 75.98, 77.25, and 130.27 kJ/mol. Acid and alkali pretreatment was utilized to increase the cellulose content in biomass but the alkaline treatments generally yielded higher cellulose contents with less degradation compared to acidic treatments. [ABSTRACT FROM AUTHOR]
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Databáze: Complementary Index
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Abstrakt:The present study employed alkali and acidic pretreatment methods to extract cellulose fibers from palm frond biomass. Also, the TGA is employed to quantify the proportions of the primary constituents: hemicellulose, cellulose, and lignin. Each of these components decomposes at a characteristic temperature, allowing for an estimation of their percentages in the sample. Three first-order independent parallel reactions were predicted having hemicellulose, cellulose, and lignin as the major constituents while multi-component kinetic modeling was applied to compute the kinetic parameters of each component, activation energy, and pre-exponential factor, at each peak temperature. As a result, One-dimensional Diffusion (D1) was found to be the best-representing TGA of the palm frond biomass decomposition. The compositions of palm frond waste were 31, 30.65, and 37.71% of hemicellulose, cellulose, and lignin. The obtained activation energies of the hemicellulose, cellulose, and lignin were 75.98, 77.25, and 130.27 kJ/mol. Acid and alkali pretreatment was utilized to increase the cellulose content in biomass but the alkaline treatments generally yielded higher cellulose contents with less degradation compared to acidic treatments. [ABSTRACT FROM AUTHOR]
ISSN:18785190
DOI:10.1007/s11144-025-02828-w