Effect of catalysts on the yield and properties of lignin from microwave-assisted acetosolv extraction of oil palm empty fruit bunch fibres

Muhammad Nor Arifin Yaakob, . and Rasidi Roslan, . and Nurjannah Salim, . and Siti Noor Hidayah Mustapha, . and Sarani Zakaria, . and Chia Chin Hua, . and Mohd Shaiful Sajab, . Effect of catalysts on the yield and properties of lignin from microwave-assisted acetosolv extraction of oil palm empty fruit bunch fibres. pp. 74-83. ISSN 1511-2780

Acetosolv is an enhancement organosolv technique utilising acetic acid as solvent and produces high purity of lignin. However the limitation of this technique in the conventional heating method is the high energy consumption during a long reaction time. Therefore the employment of microwave is used to overcome this limitation with the expectation of a lower power consumption and short reaction time. In this study three types of catalysts sulphuric acid (H‚‚SO‚„) aluminium choride (AlCl‚) and chromium nitrate Cr(NO‚)‚ were used to investigate the lignin extraction performance and its properties from microwave-assisted (MWA) acetosolv treatment of oil palm empty fruit bunches (EFB). The highest yields of lignin (76.98) were obtained using an aqueous solution of acetic acid combined with 3.0 of H‚‚SO‚„ under 110C for 30 min. Meanwhile AlCl‚ performed almost similar to H‚‚SO‚„ providing lignin yield of 71.57 at the highest temperature of 110C. The usage of microwave-assisted technique also produces a high yield and high purity of lignin. It is also proven that AlCl‚ can be a substitute to Bronsted acid for lignin extraction. However Cr(NO‚)‚ was found not suitable for the lignins extraction despite having a high potential for cellulose extraction.

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Abstract

Acetosolv is an enhancement organosolv technique utilising acetic acid as solvent and produces high purity of lignin. However the limitation of this technique in the conventional heating method is the high energy consumption during a long reaction time. Therefore the employment of microwave is used to overcome this limitation with the expectation of a lower power consumption and short reaction time. In this study three types of catalysts sulphuric acid (H‚‚SO‚„) aluminium choride (AlCl‚) and chromium nitrate Cr(NO‚)‚ were used to investigate the lignin extraction performance and its properties from microwave-assisted (MWA) acetosolv treatment of oil palm empty fruit bunches (EFB). The highest yields of lignin (76.98) were obtained using an aqueous solution of acetic acid combined with 3.0 of H‚‚SO‚„ under 110C for 30 min. Meanwhile AlCl‚ performed almost similar to H‚‚SO‚„ providing lignin yield of 71.57 at the highest temperature of 110C. The usage of microwave-assisted technique also produces a high yield and high purity of lignin. It is also proven that AlCl‚ can be a substitute to Bronsted acid for lignin extraction. However Cr(NO‚)‚ was found not suitable for the lignins extraction despite having a high potential for cellulose extraction.

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Item Type:	Article
AGROVOC Term:	Catalysts
AGROVOC Term:	Lignins
AGROVOC Term:	Oil palm
AGROVOC Term:	Microwave treatment
AGROVOC Term:	Experiments
AGROVOC Term:	analysis
AGROVOC Term:	Extraction
AGROVOC Term:	Lignocellulose
Depositing User:	Mr. AFANDI ABDUL MALEK
Last Modified:	24 Apr 2025 00:55
URI:	http://webagris.upm.edu.my/id/eprint/9801

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