The impact of acid hydrolysis conditions on carbohydrate determination in lignocellulosic materials: a case study with Eucalyptus globulus bark
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Ricardo Jorge Oliveira
, Pedro C. Branco
Abstract
Lignocellulosic biomass represents a suitable feedstock for production of biofuels and bioproducts. Its chemical composition depends on many aspects (e.g. plant source, pre-processing) and it has impact on productivity of industrial bioprocesses. Numerous methodologies can be applied for biomass characterisation, with acid hydrolysis being a particularly relevant step. This study intended to assess the most suitable procedures for acid hydrolysis, taking Eucalyptus globulus bark as a case study. For that purpose, variation of temperature (90–120 °C) was evaluated over time (0–5 h), through monosaccharides and oligosaccharides contents and degradation. For glucose, the optimal conditions were 100 °C for 2.5 h, reaching a content of 48.6 wt.%. For xylose, the highest content (15.2 wt.%) was achieved at 90 °C for 2 h, or 120 °C for 0.5 h. Maximum concentrations of mannose and galactose (1.0 and 1.7 wt.%, respectively) were achieved at 90 and 100 °C (2–3.5 h) or at 120 °C (0.5–1 h). These results revealed that different hydrolysis conditions should be applied for different sugars. Using this approach, total sugar quantification in eucalyptus bark was increased by 4.3%, which would represent a 5% increase in the ethanol volume produced, considering a hypothetical bioethanol production yield. This reflects the importance of feedstock characterization on determination of economic viability of industrial processes.
Funding source: Project Inpactus – Innovative Products and Technologies from Eucalyptus
Award Identifier / Grant number: POCI-01-0247-FEDER-021874
Author contributions: All the authors have accepted responsibility for the entire content of this submitted manuscript and approved submission.
Research funding: This work was carried out under the Project Inpactus – Innovative Products and Technologies from Eucalyptus, Project No. 21874 funded by Portugal 2020 through European Regional Development Fund (ERDF) in the frame of COMPETE 2020 n° 246/AXIS II/2017.
Conflict of interest statement: The authors declare no conflicts of interest regarding this article.
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Supplementary Material
The online version of this article offers supplementary material (https://doi.org/10.1515/hf-2020-0250).
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Articles in the same Issue
- Frontmatter
- Original articles
- Ultrasound to estimate the physical-mechanical properties of tropical wood species grown in an agroforestry system
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Articles in the same Issue
- Frontmatter
- Original articles
- Ultrasound to estimate the physical-mechanical properties of tropical wood species grown in an agroforestry system
- Natural durability and improved resistance of 20 Amazonian wood species after 30 years in ground contact
- Cellular-level chemical changes in Japanese beech (Fagus crenata Blume) during artificial weathering
- Evaluation of water related properties of birch wood products modified with different molecular weight phenol-formaldehyde oligomers
- Superhydrophobic wood surface fabricated by Cu2O nano-particles and stearic acid: its acid/alkali and wear resistance
- Dynamic strength properties and structural integrity of wood modified with cyclic N-methylol and N-methyl compounds
- Indoor storage time affects the quality and quantity of volatile monoterpenes emitted from softwood timber
- The impact of acid hydrolysis conditions on carbohydrate determination in lignocellulosic materials: a case study with Eucalyptus globulus bark
- Improved chemical pulping and saccharification of a natural mulberry mutant deficient in cinnamyl alcohol dehydrogenase