Extracting hemicelluloses from softwood and bagasse as oligosaccharides using pure water and microwave heating

Tore AA. Gulbrandsen, Ingvild A. Johnsen, Mihaela Tanase Opedal, Kai Toven, Karin Øyaas, Andrey Pranovich, Jyri-Pekka Mikkola, Bård H. Hoff

Tutkimustuotos: LehtiartikkeliArtikkeliTieteellinenvertaisarvioitu

16 Sitaatiot (Scopus)

Abstrakti

The objective of the study was to identify conditions for hemicelluloses extraction in oligomeric form. Using microwave assisted hot water extraction (HWE), the effects of both retention time and temperature on hemicelluloses yields, as well as the degree of polymerization (DP) as analyzed by SEC-MALLS, were investigated using both softwood (sawmill shavings) and sugarcane bagasse. The results are discussed in the light of the unavoidable yield-DP compromise resulting from the application of batch mode operations. Nevertheless, significant differences between the two raw materials could be observed, as expected. For softwood shavings, data interpolation indicated that about 50% of the hemicelluloses could be obtained as oligomers at an average DP of 30 when extracted at 183 degrees C for 5 minutes. For bagasse, longer extraction times seemed optimal. After hot water extraction at 183 degrees C for 12 minutes, about 62% of the bagasse hemicelluloses were extracted as oligomers at an average DP of about 100.
AlkuperäiskieliEi tiedossa
Sivut117–126
JulkaisuCellulose Chemistry and Technology
Vuosikerta49
Numero2
TilaJulkaistu - 2015
OKM-julkaisutyyppiA1 Julkaistu artikkeli, soviteltu

Viittausmuodot