Evaluation of organosolv pretreatment for the conversion of Pinus radiata D. Don to ethanol

Araque, Edgardo; Parra, Carolina; Freer, Juanita; Contreras, David; Rodrı́guez, Jaime; Mendonça, Regis Teixeira; Baeza, Jaime

doi:10.1016/j.enzmictec.2007.08.006

Cited by 153 publications

(81 citation statements)

References 29 publications

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“…In contrast, Pazner and Behera have shown that the extraction of lignin during an organosolv (methanol-water mixture) process occurs from secondary wall and middle lamellae, from the beginning of the process at approximately the same rate [29]. Acetone-water is a very good solvent for lignins, as shown by da Silva Perez et al [11], Balogh et al [30], Jimenez et al [31], Araque et al [32]. Therefore, great selectivity is expected to occur even from the beginning of the extraction process.…”

Section: R = Weight Fraction Of Polysaccharides Resistant To Solubilimentioning

confidence: 93%

Selective Acetone-Water Delignification of Eucalyptus urograndis: An Alternative Towards the Biorefinery Approach

Denilson¹

2010

toaj

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Acetone-water (50:50 v/v) delignification of Eucalyptus urograndis (a hybrid of Eucalyptus urophylla and Eucalyptus grandis) was studied at temperatures ranging from 145 o C to 195 o C. Lignin and polysaccharide extraction kinetics were determined from pulp yield and residual lignin measurements. Arrhenius-type activation energy of initial, bulk and residual delignification phases were estimated respectively as 102.3, 117.7 and 89.0 kJ.mol -1 . For polysaccharide removal, the values were 119.4 and 177.9 kJ for slower and faster reactions, respectively.The selectivity of the acetone-water delignification was approached through the interrelationship between delignification and polysaccharide removal. In contrast to kraft pulping, high selectivity is observed in the beginning of the pulping process and then decreases along the process. The first derivative of the lignin extraction curve presents two maxima, one in the beginning of the extraction and the second one between 65 % and 50 % of pulp yield and can speculating be related to the initial and bulk delignification phases. On the other hand, polysaccharides, probably hemicelluloses, are selectively extracted between 85 and 65 % of pulp yield. The process fits perfectly with the biomass biorefinery approach which consists in selectively separate and add-value to different fractions of wood.

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Section: R = Weight Fraction Of Polysaccharides Resistant To Solubilimentioning

confidence: 93%

Selective Acetone-Water Delignification of Eucalyptus urograndis: An Alternative Towards the Biorefinery Approach

Denilson¹

2010

toaj

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“…Sin embargo la dificultad y los costos elevados de la recuperación de éstos hacen que la practicidad de su empleo disminuya considerablemente. Araque et al (2008) optimizaron las condiciones del pretratamiento organosolv con acetona para pretratar astillas de Pinus radiata D. Don y conseguir un rendimiento de etanol elevado. El material pretratado a una temperatura de 185 °C, por 5 min, con relación acetona: agua de 1:1 produjo un rendimiento de etanol del 99,5%.…”

Section: Organosolvunclassified

Efecto del Pretratamiento de Biomasa Maderera en el Rendimiento a Etanol

Gómez

Ríos

Peña³

2013

Inf. tecnol.

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“…The yeast strain utilized in this work was a thermal acclimatized (40°C) Saccharomyces cerevisiae IR2-9a (ARAQUE et al, 2008). The inoculum was grown in 100 mL of liquid culture made out of glucose, 50 g .…”

Section: Simultaneous Saccharifi Cation and Fermentation (Ssf)mentioning

confidence: 99%

Bioethanol Potential From High Density Short Rotation Woody Crops on Marginal Lands in Central Chile

Acuña

Cancino

Rubilar

et al. 2017

CERNE

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Cellulosic ethanol is one of the most important biotechnological products to mitigate the consumption of fossil fuels and to increase the use of renewable resources for fuels and chemicals. Short rotation woody crops (SRWC) have been proposed as the most promising raw material for cellulosic ethanol production, as a result of its several advantages over traditional crops. In order to analyze the potential as crops for lignocellulosic bioethanol production in Chile, SRWC were established with the following species: Acacia melanoxylon, Eucalyptus camaldulensis, Eucalyptus globulus and Eucalyptus nitens. These crops were established in two contrasting environments and in three plantation densities. The average theoretical ethanol yield at 48 months reached 395.9 L . t -1 for A. melanoxylon, 348.7 L . t -1 for E. camaldulensis, and 363.9 L t -1 for E. nitens. It can be concluded that there are significant differences in polysaccharides yield between species and time. On the other hand, significant differences were found between environments.In conclusion, this study has shown that the choice of SRWC species used as a source of polysaccharides must take into account the percentage content in biomass and, crucially, the species, planting density, harvest cycle and site must be carefully selected to ensure a high biomass yield per unit area. POTENCIAL DE BIOETANOL DE CULTURAS LENHOSAS CONDUZIDAS EM ALTA DENSIDADE E CURTA ROTAÇÃO EM TERRAS MARGINAIS NO CHILE CENTRALRESUMO: Etanol celulósico é um dos mais importantes produtos biotecnológicos para reduzir o consumo de combustíveis fósseis e a aumentar a utilização de recursos renováveis para combustíveis e produtos químicos. Culturas lenhosas de curta rotação (CLCR) têm sido propostas como a mais promissora matéria prima para produção de etanol celulósico, devido às suas várias vantagens sobre culturas tradicionais. Para analisar o potencial de culturas para produção de bioetanol lignocelulósicos no Chile, CLCR foram estabelecidos com as seguintes espécies: Acacia melanoxylon, Eucalyptus camaldulensis, Eucalyptus globulus e Eucalyptus nitens. Estas culturas foram estabelecidas em dois ambientes contrastantes e em três densidades de plantio. O rendimento teórico médio de etanol em 48 meses atingiu 395,9 L . t -1 para A. melanoxylon, 348,7 L . t -1 para E. camaldulensis e 363,9 L . t -1 para E. nitens. Foi concluído que existem diferenças significativas no rendimento de polissacarídeos entre as espécies e o tempo. Por outro lado, foram encontradas diferenças significativas entre ambientes. Em conclusão, este estudo mostrou que a escolha da espécie usada na CLCR como fonte de polissacarídeos deve levar em conta sua percentagem na biomassa e, crucialmente, a espécie, densidade de plantio, ciclo de colheita e sítio devem ser cuidadosamente selecionados para garantir um rendimento elevado de biomassa por unidade de área.

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Evaluation of organosolv pretreatment for the conversion of Pinus radiata D. Don to ethanol

Cited by 153 publications

References 29 publications

Selective Acetone-Water Delignification of Eucalyptus urograndis: An Alternative Towards the Biorefinery Approach

Selective Acetone-Water Delignification of Eucalyptus urograndis: An Alternative Towards the Biorefinery Approach

Efecto del Pretratamiento de Biomasa Maderera en el Rendimiento a Etanol

Bioethanol Potential From High Density Short Rotation Woody Crops on Marginal Lands in Central Chile

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