Holistic lignocellulosic biorefinery approach for dual production of bioethanol and xylonic acid coupled with efficient dye removal.
In: Renewable & Sustainable Energy Reviews, Jg. 185 (2023-10-01), S. N.PAG
academicJournal
Zugriff:
The complete valorization of lignocellulosic biomass (LCB) to valuable bio-products with one-step fractionation is still challenging. This study represents sustainable waste-free biorefinery routes for efficient fractionation of LCB, employing a novel pretreatment method using hydrotropic p– toluenesulfonic acid (TsOH) mixed with pentanol. The potential of LCB pretreatment using TsOH/pentanol reagent as lignin absorbent with co-production of bioethanol and xylonic acid was investigated. Biomass pretreatment at 120 °C for 40 min with 20% TsOH dosage was the optimal condition that significantly dissolved more than 88.2% of lignin and 95.1% of hemicellulose in the biphasic phase, while 95.6% of cellulose was retained in the solid phase. Further fermentation of cellulose-rich fraction using Saccharomyces cerevisiae resulted in 225 g kg−1 bioethanol yield. In addition, xylose-rich phase was converted into xylonic acid by Gluconobacter oxydans fermentation with a yield of 202 g kg−1. Importantly, the isolated lignin was altered by acid groups during sulphonation through TsOH/pentanol pretreatment, which makes lignin a potential adsorbent for cationic contaminants in wastewater. In particular, the isolated lignin achieved high adsorption capacity (300 mg/g) of methylene blue. The proposed biorefinery routes showed a high net positive energy of 3.65 MJ kg−1 dry biomass with an energy ratio of 1.70. Therefore, this study provides an innovative synergistic pretreatment using TsOH/pentanol as a promising fractionation process for efficient cascade valorization of LCB into valuable bio-products. [Display omitted] • A novel TsOH/pentanol pretreatment was introduced for complete valorization of LCB. • Cellulose-rich fraction obtained a bioethanol yield of 225 g kg−1. • Xylose-rich phase converted into xylonic acid with a yield of 202 g kg−1. • Modified lignin showed excellent adsorption of methylene blue (300 mg/g). • Proposed biorefinery routes showed a high net positive energy of 3.65 MJ kg−1. [ABSTRACT FROM AUTHOR]
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Holistic lignocellulosic biorefinery approach for dual production of bioethanol and xylonic acid coupled with efficient dye removal.
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Autor/in / Beteiligte Person: | Madadi, Meysam ; Elsayed, Mahdy ; Song, Guojie ; Bakr, Mahmoud M. ; Qin, Yuanhang ; Sun, Fubao ; Abomohra, Abdelfatah |
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Zeitschrift: | Renewable & Sustainable Energy Reviews, Jg. 185 (2023-10-01), S. N.PAG |
Veröffentlichung: | 2023 |
Medientyp: | academicJournal |
ISSN: | 1364-0321 (print) |
DOI: | 10.1016/j.rser.2023.113605 |
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