Comprehensive analysis of sugarcane bagasse steam explosion using autocatalysis and dilute acid hydrolysis (H3PO4 and H2SO4) at equivalent combined severity factors

Fockink, Douglas H.; Sánchez, Jorge H.; Ramos, Luiz Pereira

doi:10.1016/j.indcrop.2018.07.017

Cited by 44 publications

(20 citation statements)

References 36 publications

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“…The steam explosion of S. officinarum bagasse yielded the pre-hydrolysate So1, having the highest amounts of aliphatic acids (about 14.2 g/L) and furans (2.2 g/L). These values agree with those described in other steam-exploded sugarcane bagasse samples ( Martìn et al, 2002 ; Fockink et al, 2018 ). The higher severity, the higher release of inhibitors in both P. australis and C. cardunculus pre-hydrolysates ( Table 1 ).…”

Section: Resultssupporting

confidence: 91%

Selection of Superior Yeast Strains for the Fermentation of Lignocellulosic Steam-Exploded Residues

et al. 2021

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The production of lignocellulosic ethanol calls for a robust fermentative yeast able to tolerate a wide range of toxic molecules that occur in the pre-treated lignocellulose. The concentration of inhibitors varies according to the composition of the lignocellulosic material and the harshness of the pre-treatment used. It follows that the versatility of the yeast should be considered when selecting a robust strain. This work aimed at the validation of seven natural Saccharomyces cerevisiae strains, previously selected for their industrial fitness, for their application in the production of lignocellulosic bioethanol. Their inhibitor resistance and fermentative performances were compared to those of the benchmark industrial yeast S. cerevisiae Ethanol Red, currently utilized in the second-generation ethanol plants. The yeast strains were characterized for their tolerance using a synthetic inhibitor mixture formulated with increasing concentrations of weak acids and furans, as well as steam-exploded lignocellulosic pre-hydrolysates, generally containing the same inhibitors. The eight non-diluted liquors have been adopted to assess yeast ability to withstand bioethanol industrial conditions. The most tolerant S. cerevisiae Fm17 strain, together with the reference Ethanol Red, was evaluated for fermentative performances in two pre-hydrolysates obtained from cardoon and common reed, chosen for their large inhibitor concentrations. S. cerevisiae Fm17 outperformed the industrial strain Ethanol Red, producing up to 18 and 39 g/L ethanol from cardoon and common reed, respectively, with ethanol yields always higher than those of the benchmark strain. This natural strain exhibits great potential to be used as superior yeast in the lignocellulosic ethanol plants.

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Section: Resultssupporting

confidence: 91%

Selection of Superior Yeast Strains for the Fermentation of Lignocellulosic Steam-Exploded Residues

et al. 2021

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“…It means that the glucose in the EFB took limited damage by the steam explosion process and the organosolv treatment. It is possible that long reaction times increased the accumulation of degradation by-products and mass losses by volatilization [22]. As the acid concentration increased, however, the amount of glucose in the solid steadily decreased.…”

Section: Effect Of Dilute Acid Impregnation On Fractionationmentioning

confidence: 99%

Fractionation of Cellulose-Rich Products from an Empty Fruit Bunch (EFB) by Means of Steam Explosion Followed by Organosolv Treatment

et al. 2020

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In this study an empty fruit bunch (EFB) was subjected to a two-step pretreatment to defragment cellulose-rich fractions as well as lignin polymers from its cell walls. First pretreatment: acid-catalyzed steam explosion (ACSE) pretreatment of EFB was conducted under the temperature range of 180–220 °C and residence time of 5–20 min. The ACSE-treated EFB was further placed into the reactor containing 50% aq. ethanol and NaOH as a catalyst and heated at a temperature of 160 °C for 120 min for the second pretreatment: alkali-catalyzed organosolv treatment (ACO). The mass balance and properties of treated EFB were affected by the residence time. The lowest yield of a solid fraction was obtained when the residence time was kept at 15 min. Xylose drastically decreased, especially under the ACSE pretreatment. However, the crystallinity of cellulose increased by increasing the severity factor of the pretreatment and was 47.8% and 57% udner the most severe conditions. The organosolv lignin fractions also showed the presence of 14 major peaks via their pyrolysis-GC analysis. From here, it can be suggested that this kind of pretreatment can indeed be one potential option for lignocellulosic pretreatment.

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“…The two parameters time and temperature being correlated, severity factors which combined them have been proposed in the literature. These factors are currently broadly employed in order to facilitate the control and the optimization of the SE process ( Overend and Chornet, 1987 ; Fockink et al, 2018 ; Bonfiglio et al, 2019 ; Obame et al, 2019 ). However, these factors are based on semi-empirical kinetic approaches and assumptions that require discussion and clarification.…”

Section: Introductionmentioning

confidence: 99%

Steam Explosion Pretreatment of Lignocellulosic Biomass: A Mini-Review of Theorical and Experimental Approaches

2021

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Steam Explosion (SE) is one of the most efficient and environmentally friendly processes for the pretreatment of lignocellulosic biomass. It is an important tool for the development of the biorefinery concept to mitigate the recalcitrance of biomass. However, the two distinct steps of SE, steam cracking and explosive decompression, leading to the breakdown of the lignocellulosic matrix have generally been studied in empiric ways and clarification are needed. This mini-review provides new insights and recommendations regarding the properties of subcritical water, process modeling and the importance of the depressurization rate.

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Comprehensive analysis of sugarcane bagasse steam explosion using autocatalysis and dilute acid hydrolysis (H3PO4 and H2SO4) at equivalent combined severity factors

Cited by 44 publications

References 36 publications

Selection of Superior Yeast Strains for the Fermentation of Lignocellulosic Steam-Exploded Residues

Selection of Superior Yeast Strains for the Fermentation of Lignocellulosic Steam-Exploded Residues

Fractionation of Cellulose-Rich Products from an Empty Fruit Bunch (EFB) by Means of Steam Explosion Followed by Organosolv Treatment

Steam Explosion Pretreatment of Lignocellulosic Biomass: A Mini-Review of Theorical and Experimental Approaches

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