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Biorefining of Aucoumea klaineana wood: Impact of steam explosion on the composition and ultrastructure the cell wall

Authors: Besserer, Arnaud; Obame, Sebastien Ngwa; Safou-Tchima, Rodrigue; Saker, Safwan; Ziegler-Devin, Isabelle; Brosse, Nicolas;

Biorefining of Aucoumea klaineana wood: Impact of steam explosion on the composition and ultrastructure the cell wall

Abstract

Aucoumea klaineana Pierre (okoumé) is a tropical hardwood used in the timber industry in the Congo area to produce veneers and plywood. This paper described the utilization of sapwood co-products from this industry according to a biorefinery approach to generate both bioethanol and lignin. A batch Steam Explosion (SE) was used as a pretreatment after acid impregnation (H 2 SO 4 0.25 % or 0.50 % w/w) at various pressure (8-19 MPa) and residence times (2.5-7.5 min). The impact of the process was examined at the molecular and parietal scales. The pulp composition was examined in terms of lignin, glucose and xylose content, cellulose crystallinity (CrI %) and degree of polymerization (DP). The conditions of 2 high pretreatment severity led to an almost total xylans removal (residual xylans 80 % with an excellent fermentability into ethanol by S. Cerevisiae. Using these operating conditions, one ton of okoumé sapwood could produce 112 kg of ethanol and 82 kg of high purity lignin.

Keywords

[CHIM.POLY] Chemical Sciences/Polymers, [SPI.GPROC] Engineering Sciences [physics]/Chemical and Process Engineering, Aucoumea klaineana Pierre, lignin, pretreatment, [SPI.MAT] Engineering Sciences [physics]/Materials, [CHIM.ORGA] Chemical Sciences/Organic chemistry, steam explosion, bioethanol

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citations
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
19
Top 10%
Average
Top 10%
Green
Related to Research communities
Energy Research