Separation Of Galactoglucomannans, Lignin, And Lignin-Carbohydrate Complexes From Hot-Water-Extracted Norway Spruce By Cross-Flow Filtration And Adsorption Chromatography
2012 (English)In: BioResources, ISSN 1930-2126, Vol. 7, no 4, 4501-4516 p.Article in journal (Refereed) Published
A simple method to simultaneously recover polymeric carbohydrates, mainly galactoglucomannans (GGM), lignin, and lignin-carbohydrate complex (LCC) from hot-water-extracted Norway spruce wood is presented. The isolation method consists of cross-flow filtration, where high and low molecular mass species are removed, followed by fixed-bed adsorption on a hydrophobic polymeric resin (XAD-16) to remove lignins and lignans. In the second step of fixed-bed adsorption, a phenylic reversed-phase analytical chromatography column, where mass transport resistance is minimized and a very high selectivity towards aromatic compounds have been observed, was used to separate LCC from GGM. The isolated LCC fraction contained about 10% aromatics, whereas the upgraded GGM fraction contained about 1.5% aromatics and the lignin fraction contained about 56% aromatics. Polymeric xylan was accumulated in the GGM fraction, while mannose was the dominant sugar found in the LCC fraction. As products, approximately 7% was recovered in the lignin fraction in the first adsorptive step, 5% was recovered as LCC, and 88% as upgraded hemicelluloses.
Place, publisher, year, edition, pages
2012. Vol. 7, no 4, 4501-4516 p.
LCC, Lignin carbohydrate complex, GGM, galactoglucomannan, Norway spruce, Biorefinery, Separation, Sorption, Chromatography, Ultrafiltration
Paper, Pulp and Fiber Technology
IdentifiersURN: urn:nbn:se:kth:diva-109587ISI: 000311336800005ScopusID: 2-s2.0-84872773250OAI: oai:DiVA.org:kth-109587DiVA: diva2:584002
QC 201301082013-01-082013-01-082014-04-04Bibliographically approved