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

A1 Originalartikel i en vetenskaplig tidskrift (referentgranskad)


Interna författare/redaktörer


Publikationens författare: Tore AA. Gulbrandsen, Ingvild A. Johnsen, Mihaela Tanase Opedal, Kai Toven, Karin Øyaas, Andrey Pranovich, Jyri-Pekka Mikkola, Bård H. Hoff
Förläggare: Editura Academiei Romane
Publiceringsår: 2015
Tidskrift: Cellulose Chemistry and Technology
Volym: 49
Nummer: 2
Artikelns första sida, sidnummer: 117
Artikelns sista sida, sidnummer: 126


Abstrakt

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.

Senast uppdaterad 2019-14-12 vid 03:05