Blar i Bergen Open Research Archive på forfatter "Hermundsgård, Dag Helge"
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Effect of Reaction Conditions on Catalytic and Noncatalytic Lignin Solvolysis in Water Media Investigated for a 5 L Reactor
Ghoreishi, Solmaz; Barth, Tanja; Hermundsgård, Dag Helge (Peer reviewed; Journal article, 2019)The high content of oxygen in the lignin polymer and the prevalence of phenolic functional groups make the conversion of lignin to fuels and value-added products with well-defined chemical properties challenging. The ... -
Identification and quantification of valuable platform chemicals in aqueous product streams from a preliminary study of a large pilot-scale steam explosion of woody biomass using quantitative nuclear magnetic resonance spectroscopy
Ghoreishi, Solmaz; Løhre, Camilla; Hermundsgård, Dag Helge; Molnes, Joakim Lindgaard; Tanase-Opedal, Mihaela; Brusletto, Rune; Barth, Tanja (Journal article; Peer reviewed, 2022)Steam explosion breaks down the polymeric matrix and enables the recovery of valuable compounds from lignocellulosic feedstock. In the steam explosion process, biomass is treated with high-pressure steam which subsequently ... -
Investigating solids present in the aqueous stream during STEX condensate upgrading—a case study
Hermundsgård, Dag Helge; Ghoreishi, Solmaz; Opedal, Mihaela Tanase; Brusletto, Rune; Barth, Tanja (Journal article; Peer reviewed, 2022)Steam explosion (STEX) of woody biomass is an efficient pretreatment method in the production of water-resistant wood pellets. The STEX process also generates an aqueous condensate stream containing dissolved organic ... -
Storskala konvertering av biomasse til bio-olje og fraksjonering til veldefinerte produkter
Hermundsgård, Dag Helge (Master thesis, 2019-08-30)Dagens internasjonale samfunn har et stort forbruk av energi, og energibehovet øker kraftig med økt industrialisering ogteknologisk utvikling. Fossile energikilder har i stor grad dekket dette behovet i mange år, men dette ... -
Unlocking the potential of a lignocellulosic biorefinery : Optimizing yields of value-added furanic compounds in aqueous side streams from steam explosion and pellet production
Hermundsgård, Dag Helge (Doctoral thesis, 2024-04-23)Med en økende befolkning og en økende etterspørsel etter energi globalt, er vår avhengighet av fossile energikilder for å dekke våre energibehov blitt en betydelig utfordring på grunn av den begrensede tilgangen på disse ...