Assessment of chemical transformations in eucalyptus, sugarcane bagasse and straw during hydrothermal, dilute acid, and alkaline pretreatments

Carvalho, Danila Morais de; Sevastyanova, Olena; Penna, Lais Souza; Silva, Brunela Pereira da; Lindström, Mikael; Colodette, Jorge Luiz

doi:10.1016/j.indcrop.2015.04.021

Cited by 135 publications

(84 citation statements)

References 53 publications

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“…This phenomenon was also observed in hydrothermal and dilute acid pretreated eucalyptus [18] and bisulfite pretreated OPEFB [19]. The increase of the total extractive content of the pretreated OPEFB was due to some fragments of lignin and polysaccharides with lower molecular weights being re-precipitated on the fibers of the pretreated samples [18]. These fragments, which are called pseudoextractives and structures, have similar behavior to extractives, for example being soluble in the solvents that are used in the measurement of the extractive content (TAPPI Test Method).…”

Section: Effect Of Pretreatment On Opefb Chemical Componentssupporting

confidence: 61%

“…In contrast, the extractive content increased with increasing reaction temperature. This phenomenon was also observed in hydrothermal and dilute acid pretreated eucalyptus [18] and bisulfite pretreated OPEFB [19]. The increase of the total extractive content of the pretreated OPEFB was due to some fragments of lignin and polysaccharides with lower molecular weights being re-precipitated on the fibers of the pretreated samples [18].…”

Section: Effect Of Pretreatment On Opefb Chemical Componentsmentioning

confidence: 52%

“…These fragments, which are called pseudoextractives and structures, have similar behavior to extractives, for example being soluble in the solvents that are used in the measurement of the extractive content (TAPPI Test Method). This made the extractive contents of the hydrothermal and dilute acid pretreated eucalyptus (12.4% and 18.9%, respectively) higher than that of the untreated eucalyptus (2.3%) [18]. Similar behavior could also occur in dilute acid pretreated OPEFB.…”

Section: Effect Of Pretreatment On Opefb Chemical Componentsmentioning

confidence: 77%

See 2 more Smart Citations

Disruption of Oil Palm Empty Fruit Bunches by Microwave-assisted Oxalic Acid Pretreatment

Solihat

Sari

Risanto

et al. 2017

J. Math. Fund. Sci.

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Abstract. Developing an effective pretreatment for the conversion of lignocellulosic biomass to ethanol is an important effort in reducing the cost of this process. Microwave-assisted pretreatment is considered a green technology that can effectively break down lignocellulosic structures. The objective of this study was to investigate the most effective temperature for microwave-assisted oxalic acid pretreatment regarding the structural characteristic changes of oil palm empty fruit bunches (OPEFB) fibers. The fibers were subjected to microwave-assisted oxalic acid pretreatment at 160-200 °C with 2.5 minutes heating time and a liquid to solid ratio of 10. The effectiveness of the pretreatment was determined based on its delignification selectivity, morphological characteristics, and functional group changes. Microwave irradiation of OPEFB fibers at 180 ºC was effective in increasing the cellulose content by 24%. This pretreatment resulted in 1.82 delignification selectivity. More than 50% of the hemicellulose of the OPEFB was removed after this treatment, which was confirmed by a decrease of the absorption bands of functional groups at 1732 cm -1 . The increase of pretreatment temperature disrupted the morphological structure of the OPEFB and removed its hemicellulose but did not change its functional groups and lignin content.

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Section: Effect Of Pretreatment On Opefb Chemical Componentssupporting

confidence: 61%

Section: Effect Of Pretreatment On Opefb Chemical Componentsmentioning

confidence: 52%

Section: Effect Of Pretreatment On Opefb Chemical Componentsmentioning

confidence: 77%

See 1 more Smart Citation

Disruption of Oil Palm Empty Fruit Bunches by Microwave-assisted Oxalic Acid Pretreatment

Solihat

Sari

Risanto

et al. 2017

J. Math. Fund. Sci.

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“…After the acid pretreatment, the percentage of cellulose in the insoluble material recovered increased (Table 8) as a natural consequence of the removal of the hemicellulose fraction (Carvalho et al, 2015). After enzymatic digestion of the pretreated material, the cellulose content in the recovered insoluble material decreased by different degrees that depended on the genotype (Table 8).…”

Section: Genotypementioning

confidence: 99%

Evaluation of productivity of sweet potato genotypes for first and second generation bioethanol production

Daniel¹,

Silvânia²,

Karen³

et al. 2017

Afr. J. Biotechnol.

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The increased supply of ethanol fuel and its spread as an alternative to fossil fuels depend on the exploration of biomasses that can be regarded as alternatives to sugarcane and maize. In this study, the agricultural productivity and the potential for production of ethanol from roots and the aerial portion of twenty sweet potato genotypes were evaluated. The roots and branches were harvested 180 days after planting. Starch, hemicellulose, cellulose, lignin and soluble sugars from sweet potato roots or branches were determined and expressed as percentage of dry matter produced per hectare. The genotype UFVJM 28 stood out for the production of root and branches (fresh material), yielding 43.5 and 31.7 t ha . Considering the combined use of roots and branches, at least four sweet potatoes genotypes presented a potential for ethanol production greater than 4000 L ha -1 in a 180-day cycle.

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“…Zhu and Pan (2010) has presented a comprehensive discussion of the key technical issues of woody biomass pretreatment including: dilute acid, acid-catalyzed steam explosion, organosolv, sulfite, and alkaline pretreatment. Work on eucalyptus is ongoing to improve the enzymatic accessibility of the biomass such as: hydrothermal, dilute acid, and alkaline pretreatment (de Carvalho et al, 2015), hydrothermal microwaves using acidic ionic liquid as catalyst (Xu et al, 2015), and steam explosion processing (Romaní et al, 2013).…”

Section: Introductionmentioning

confidence: 99%

Suitability assessment of a continuous process combining thermo-mechano-chemical and bio-catalytic action in a single pilot-scale twin-screw extruder for six different biomass sources

Vandenbossche

Brault

Hernández-Meléndez

et al. 2016

Bioresource Technology

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et al.. Suitability assessment of a continuous process combining thermo-mechano-chemical and biocatalytic action in a single pilot-scale twin-screw extruder for six different biomass sources. Bioresource Technology, Elsevier, 2016Elsevier, , vol. 211, pp. 146-153. <10.1016Elsevier, /j.biortech.2016 h i g h l i g h t sAdaptation of lignocellulosic biomass deconstruction process on pilot scale extruder. Combination of alkali pretreatment and biocatalytic action in extruder. Validated of the process on six different lignocellulosic biomasses. Keywords:Lignocellulosic biomass Twin-screw extruder Alkaline pre-treatment Enzymatic hydrolysis Bioextrusion a b s t r a c t A process has been validated for the deconstruction of lignocellulose on a pilot scale installation using six types of biomass selected for their sustainability, accessibility, worldwide availability, and differences of chemical composition and physical structure. The process combines thermo-mechano-chemical and bio-catalytic action in a single twin-screw extruder. Three treatment phases were sequentially performed: an alkaline pretreatment, a neutralization step coupled with an extraction-separation phase and a bioextrusion treatment. Alkaline pretreatment destructured the wall polymers after just a few minutes and allowed the initial extraction of 18-54% of the hemicelluloses and 9-41% of the lignin. The bioextrusion step induced the start of enzymatic hydrolysis and increased the proportion of soluble organic matter. Extension of saccharification for 24 h at high consistency (20%) and without the addition of new enzyme resulted in the production of 39-84% of the potential glucose.

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Assessment of chemical transformations in eucalyptus, sugarcane bagasse and straw during hydrothermal, dilute acid, and alkaline pretreatments

Cited by 135 publications

References 53 publications

Disruption of Oil Palm Empty Fruit Bunches by Microwave-assisted Oxalic Acid Pretreatment

Disruption of Oil Palm Empty Fruit Bunches by Microwave-assisted Oxalic Acid Pretreatment

Evaluation of productivity of sweet potato genotypes for first and second generation bioethanol production

Suitability assessment of a continuous process combining thermo-mechano-chemical and bio-catalytic action in a single pilot-scale twin-screw extruder for six different biomass sources

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