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Fractionation of processed spruce wood obtained in the production of ethanol

Christian Johansson ; Knut Lundquist (Institutionen för kemi- och bioteknik, Skogsindustriell kemiteknik) ; Hans Theliander (Institutionen för kemi- och bioteknik, Skogsindustriell kemiteknik)
BioResources (1930-2126). Vol. 4 (2009), 1, p. 15-25.
[Artikel, refereegranskad vetenskaplig]

Fuel ethanol can be produced from pretreated spruce wood through enzymatic hydrolysis and fermentation. Processed spruce wood samples (acid-catalyzed steam hydrolysis followed by enzymatic hydrolysis and fermentation) were fractionated into water-soluble products and residual solids. The dioxane/water soluble portions of the solids were fractionated by liquid-liquid extraction. A substantial portion of the processed wood (20-70 %) was insoluble in both water and dioxane/water. An almost pure lignin fraction, corresponding to about 20 % of the total lignin of the wood, was isolated. Examinations by 1H NMR spectroscopy showed that the processes led to extensive cleavage of arylglycerol ß-aryl ethers in the lignin. The lignin content of other fractions could be estimated very roughly by IR spectroscopy. Purified lignin from SO2-catalyzed steam hydrolysis contained approx. 0.2 % sulphur.

Nyckelord: Lignin, Fractionation, Ethanol, Enzymatic hydrolysis, Lignin content, Sulphur content

Denna post skapades 2009-02-18. Senast ändrad 2013-10-29.
CPL Pubid: 89935


Institutioner (Chalmers)

Institutionen för kemi- och bioteknik, Skogsindustriell kemiteknik (2005-2014)


Kemiska processer

Chalmers infrastruktur