Academic Journal
Green Fractionation Approaches for the Integrated Upgrade of Corn Cobs
| العنوان: | Green Fractionation Approaches for the Integrated Upgrade of Corn Cobs |
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| المؤلفون: | Fialho, João, Moniz, Patricia, Duarte, Luís C., Carvalheiro, Florbela |
| بيانات النشر: | MDPI |
| سنة النشر: | 2023 |
| المجموعة: | Laboratório Nacional de Energia e Geologia: Repositório Científico do LNEG |
| مصطلحات موضوعية: | Enzymatic hydrolysis, Wheat Straw, Lignocellulosic biomass, Organosolv process, Biorefinery |
| الوصف: | Corn cob is an abundant agricultural residue worldwide, with high potential and interesting composition, and its valorization still needs to be studied. Selectively fractionating its structural components (hemicellulose, cellulose, and lignin), value-added products can be produced, eliminating waste. In this work, integrated fractionation approaches were developed and evaluated. First, an organosolv process was optimized (ethanol:water, 50:50, w/w). Then, as a comparative method, alkaline delignification (using NaOH, 1-2%) was also studied. The organosolv process allowed a significant delignification of the material (79% delignification yield) and, at the same time, a liquid phase containing a relevant concentration (14.6 g/L) of xylooligosaccharides (XOS). The resulting solid fraction, rich in cellulose, showed an enzymatic digestibility of 90%. The alkaline process increased the delignification yield to 94%, producing a solid fraction with a cellulose enzymatic digestibility of 83%. The two later techniques were also used in a combined strategy of hydrothermal processing (autohydrolysis) followed by delignification. The first allowed the selective hydrolysis of hemicellulose to produce XOS-rich hydrolysates (26.8 g/L, 67.3 g/100 g initial xylan). The further delignification processes, alkaline or organosolv, led to global delignification yields of 76% and 93%, respectively. The solid residue, enriched in glucan (above 75% for both combined processes), also presented high enzymatic saccharification yields, 89% and 90%, respectively. The fractionation strategies proposed, and the results obtained are very promising, enabling the integrated upgrading of this material into a biorefinery framework. ; info:eu-repo/semantics/publishedVersion |
| نوع الوثيقة: | article in journal/newspaper |
| اللغة: | English |
| تدمد: | 2305-7084 |
| Relation: | info:eu-repo/grantAgreement/FCT/9444 - RNIIIE/PINFRA%2F22059%2F2016/PT; https://doi.org/10.3390/chemengineering7020035; Fialho, João. [et.al.] - Green Fractionation Approaches for the Integrated Upgrade of Corn Cobs. In: Chemengineering, 2023, vol. 7 (2), article nº 35; http://hdl.handle.net/10400.9/4063 |
| DOI: | 10.3390/chemengineering7020035 |
| الاتاحة: | http://hdl.handle.net/10400.9/4063 https://doi.org/10.3390/chemengineering7020035 |
| Rights: | openAccess ; http://creativecommons.org/licenses/by/4.0/ |
| رقم الانضمام: | edsbas.9DD4F01 |
| قاعدة البيانات: | BASE |
| تدمد: | 23057084 |
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| DOI: | 10.3390/chemengineering7020035 |