Production of second generation ethanol using Eucalyptus dunnii bark residues and ionic liquid pretreatment

Reina, Luis; Botto, Emiliana; Mantero, C.; Moyna, Patrick; Menéndez, Pilar

doi:10.1016/j.biombioe.2016.06.023

Cited by 42 publications

(11 citation statements)

References 30 publications

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“…The results are in accordance with the chemical composition of Eucalyptus globulus bark (Neiva et al, 2018). Nevertheless, lower content in glucan and xylan and slightly higher Klason lignin (37.1%, 9.8% and 24.4%, respectively) were recently reported for Eucalyptus dunnii bark by Reina et al (2016). On the other hand, Klason lignin and xylan content were lower when comparing to wood from hardwoods such as Eucalyptus globulus wood and Acacia dealbata wood (Romaní et al, 2010;Domínguez et al, 2014).…”

Section: Chemical Composition Of the Raw Materialssupporting

confidence: 88%

Valorization of Eucalyptus nitens bark by organosolv pretreatment for the production of advanced biofuels

Romaní

Larramendi

Yáñez

et al. 2019

Industrial Crops and Products

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The biofuels production from alternative and renewable raw materials is mandatory to achieve sustainable growth based on a bioeconomy. Eucalyptus bark is a waste generated during the chemical manufacturing of Eucalyptus pulp that can be used as an alternative source of biomass, suitable for the production of biofuels. In this work, Eucalyptus nitens bark (ENB) was fractionated by organosolv treatment for ethanol production. For that, a Doehlert experimental design was carried out to evaluate the dependent variables: temperature (170-200°C), time (30-90 min) and ethanol-water percentage (50-80 %) on delignification of Eucalyptus bark. Organosolv process was suitable for the fractionation of E. nitens bark. After treatment, 74-93 % of glucan was recovered and 25-52 % of delignification was achieved. Delignified ENB was subjected to simultaneous saccharification and fermentation process for bioethanol production. The results showed that the variables temperature and time of organosolv process had significant influence on ethanol production. The organosolv pretreatment improved the ethanol yield from 32 to 99%. This work shows a suitable process for the valorization of Eucalyptus bark into bioethanol.

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Section: Chemical Composition Of the Raw Materialssupporting

confidence: 88%

Valorization of Eucalyptus nitens bark by organosolv pretreatment for the production of advanced biofuels

Romaní

Larramendi

Yáñez

et al. 2019

Industrial Crops and Products

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“…Previous research has proved that ILs have many advantages, including non-volatility, non-flammability, high thermal and chemical stability, wide electrochemical window, tunable miscibility, and good extraction capability, which are not attained for the volatile organic solvents [6][7][8]. As a result of these features and advantages, ILs are used in a wide range of applications such as catalyst [9][10][11][12][13][14], pre-treatment of biomass [15][16][17], absorbent [18][19][20], gas sensors [21], electrolyte [22][23][24], and membrane separation [25][26][27]. Among all of the applications, high-temperature utilization accounts for the vast majority, including high-temperature lubricants [28][29][30], solvents for high-temperature organic reactions [31], heat-transfer fluids [32,33], and thermal energy storage [34,35].…”

Section: Introductionmentioning

confidence: 99%

Thermal Stability of Ionic Liquids: Current Status and Prospects for Future Development

Cheng

2021

Processes

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Ionic liquids (ILs) are the safest solvent in various high-temperature applications due to their non-flammable properties. In order to obtain their thermal stability properties, thermogravimetric analysis (TGA) is extensively used to analyze the kinetics of the thermal decomposition process. This review summarizes the different kinetics analysis methods and finds the isoconversional methods are superior to the Arrhenius methods in calculating the activation energy, and two tools—the compensation effect and master plots—are suggested for the calculation of the pre-exponential factor. With both parameters, the maximum operating temperature (MOT) can be calculated to predict the thermal stability in long-term runnings. The collection of thermal stability data of ILs with divergent cations and anions shows the structure of cations such as alkyl side chains, functional groups, and alkyl substituents will affect the thermal stability, but their influence is less than that of anions. To develop ILs with superior thermal stability, dicationic ILs (DILs) are recommended, and typically, [C4(MIM)2][NTf2]2 has a decomposition temperature as high as 468.1 °C. For the convenience of application, thermal stability on the decomposition temperature and thermal decomposition activation energy of 130 ILs are summarized at the end of this manuscript.

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“…The organosolv delignification of E. nitens bark allowed the production of 33 g/L of ethanol [22]. On the other hand, 0.14 g/g bark of ethanol was obtained from Eucalyptus dunnii bark after an ionic liquid pretreatment [23]. In the context of bioethanol production, the most widely implemented strategies include; i) separate hydrolysis and fermentation (SHF), ii) simultaneous saccharification and fermentation (SSF) or iii) a combination of both, known as pre-saccharification and simultaneous saccharification and fermentation (PS-SSF) [24].…”

Section: Introductionmentioning

confidence: 99%

Co-production of biofuels and value-added compounds from industrial Eucalyptus globulus bark residues using hydrothermal treatment

Gomes

Michelin

Romaní

et al. 2021

Fuel

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In this work, hydrothermal treatment was assessed for the fractionation of industrial Eucalyptus globulus bark residue (EBR) to obtain biofuels and value-added compounds (such as oligosaccharides and phenolic compounds) in separated streams. Hydrothermal treatment was evaluated under non-isothermal regimen in the range of maximum temperature (T max) of 177-228 • C or severities (S 0) between 2.76 and 4.25. The highest oligosaccharides concentration (17.5 g/L) was achieved at S 0 of 3.69, corresponding to hemicellulose recovery of 77.30%. Under all severities evaluated in this work, over 90.94% and 84.17% of cellulose and lignin remained in the solid phase, respectively. The increase of S 0 improved 4.38-fold the enzymatic saccharification of cellulose, the highest glucose yield (84%) being achieved at S 0 of 4.04. Considering the maximal recovery of polysaccharides as glucose and oligosaccharides from the liquid and solid phases, S 0 of 4.04 was selected for bioethanol production using high solid loadings and following different strategies (simultaneous saccharification and fermentation-SSF and pre-saccharification and simultaneous saccharification and fermentation-PSSF). The utilization of 15% hydrothermally pretreated EBR without nutrient supplementation resulted in 26 g/L of ethanol, independently of the strategy used. An increase up to 17.5% solids and employing nutrient supplementation enabled the production of 38 g/L (or 4.8% v/v) of ethanol by PSSF.

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Production of second generation ethanol using Eucalyptus dunnii bark residues and ionic liquid pretreatment

Cited by 42 publications

References 30 publications

Valorization of Eucalyptus nitens bark by organosolv pretreatment for the production of advanced biofuels

Valorization of Eucalyptus nitens bark by organosolv pretreatment for the production of advanced biofuels

Thermal Stability of Ionic Liquids: Current Status and Prospects for Future Development

Co-production of biofuels and value-added compounds from industrial Eucalyptus globulus bark residues using hydrothermal treatment

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