Impact of impregnation time and chip size on sugar yield in pretreatment of softwood for ethanol production.

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Impact of impregnation time and chip size on sugar yield in pretreatment of softwood for ethanol production. / Monavari, Sanam; Galbe, Mats; Zacchi, Guido.

In: Bioresource Technology, Vol. 100, No. 24, 2009, p. 6312-6316.

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TY - JOUR

T1 - Impact of impregnation time and chip size on sugar yield in pretreatment of softwood for ethanol production.

AU - Monavari, Sanam

AU - Galbe, Mats

AU - Zacchi, Guido

PY - 2009

Y1 - 2009

N2 - Efficient pretreatment is necessary to make the wood-to-ethanol process more feasible. In this study, chips of different sizes were impregnated with SO(2) and steam-pretreated. Dilute-acid pretreatment together with subsequent enzymatic hydrolysis resulted in solubilization of between 69% and 73% of the fermentable sugars (glucose and mannose) in the raw material for the combinations of impregnation times and chip sizes investigated. Shorter impregnation times resulted in slightly lower mannose yields for the larger chips, probably due to poor diffusion of the catalyst. Small differences in glucose yield after enzymatic hydrolysis showed that the overall glucose yield was slightly higher for the smaller chips, however, whether the increased energy demand and cost of size reduction is compensated for by the higher yield, requires techno-economical evaluations.

AB - Efficient pretreatment is necessary to make the wood-to-ethanol process more feasible. In this study, chips of different sizes were impregnated with SO(2) and steam-pretreated. Dilute-acid pretreatment together with subsequent enzymatic hydrolysis resulted in solubilization of between 69% and 73% of the fermentable sugars (glucose and mannose) in the raw material for the combinations of impregnation times and chip sizes investigated. Shorter impregnation times resulted in slightly lower mannose yields for the larger chips, probably due to poor diffusion of the catalyst. Small differences in glucose yield after enzymatic hydrolysis showed that the overall glucose yield was slightly higher for the smaller chips, however, whether the increased energy demand and cost of size reduction is compensated for by the higher yield, requires techno-economical evaluations.

U2 - 10.1016/j.biortech.2009.06.097

DO - 10.1016/j.biortech.2009.06.097

M3 - Article

VL - 100

SP - 6312

EP - 6316

JO - Bioresource Technology

T2 - Bioresource Technology

JF - Bioresource Technology

SN - 0960-8524

IS - 24

ER -