Enhancing Monomeric Sugar Production from Coconut Husk by FeCl3-assisted Hydrothermal Pretreatment and Enzymatic Hydrolysis

Wijaya, Candra and Sangadji, Ningsi Lick and Muharja, Maktum and Widjaja, Tri and Riadi, Lieke and Widjaja, Arief (2025) Enhancing Monomeric Sugar Production from Coconut Husk by FeCl3-assisted Hydrothermal Pretreatment and Enzymatic Hydrolysis. BCREC (Bulletin of Chemical Reaction Engineering & Catalysis), 20 (3). pp. 535-552. ISSN Indonesia 1978-2993; ISSN International 1978-2993

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Abstract

Coconut husk (CCH), an abundant agricultural byproduct of the coconut processing industry, holds significant potential as a renewable feedstock for monomeric sugar production. However, efficient fractionation remains a challenge due to its recalcitrant lignocellulosic structure. This study investigates FeCl₃-assisted hydrothermal pretreatment (HTP) as a selective and scalable approach to enhance enzymatic hydrolysis efficiency and sugar recovery. The effects of FeCl₃ concentrations, temperatures, and unified of pretreatment conditions as combined hydrolysis factor (CHF) on biomass fractionation, modeling xylan dissolution, and monomeric sugar production were evaluated. Results indicate that 0.06 M FeCl₃ at 150 °C achieved the highest total monomeric sugar concentration of 7.364 g/L, an 11-fold increase compared to the non-catalyzed control (0.667 g/L) during HTP. This condition also facilitated 81.2% hemicellulose removal while minimizing cellulose and lignin degradation, thereby improving enzymatic digestibility. Furthermore, xylan hydrolysis also successfully developed with high correlation with unified CHF parameter. FeCl₃-assisted HTP CCH coupled with enzymatic hydrolysis further enhanced overall sugar recovery, with a total monomeric sugar yield of 18.4 g per 100 g raw CCH, representing a 4.4-fold increase compared to hydrothermally pretreated CCH without FeCl₃. These findings highlight FeCl₃-assisted HTP as a promising, cost-effective strategy for biomass fractionation, supporting its integration into lignocellulosic biorefineries for bio-based product development.

Item Type:	Article
Uncontrolled Keywords:	Coconut husk; FeCl3; monomeric sugar; hydrothermal; enzymatic hydrolysis
Subjects:	T Technology > TP Chemical technology
Divisions:	Faculty of Engineering > Department of Chemical Engineering
Depositing User:	Lieke Riadi 6116
Date Deposited:	23 Jan 2026 08:41
Last Modified:	23 Jan 2026 08:41
URI:	http://repository.ubaya.ac.id/id/eprint/50180

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