0000000001095243

AUTHOR

Jana Holm

showing 4 related works from this author

Dissolution and hydrolysis of fibre sludge using hydroxyalkylimidazolium hydrogensulphate ionic liquids

2014

Abstract The dissolution and hydrolysis of wet fibre sludge in ionic liquids (ILs) with different reaction conditions are performed in this study. Novel types of hydroxyalkylimidazolium hydrogensulphate ILs, [glymim]HSO 4 , [hemim]HSO 4 and [hpmim]HSO 4 , are especially designed and aimed to combine the dissolution and hydrolysis of wet fibre sludge in a one-step pretreatment. The results were obtained based on the analysis of total reducing sugars (TRS) with the DNS method. The dissolution and hydrolysis of fresh wild horse chestnut fruit ( Aesculus hippocastanum ) with the same ILs were also carried out as a comparison reference. Since fibre sludge is cellulose based and horse chestnut fr…

Aesculus hippocastanumReaction conditionsChromatographyRenewable Energy Sustainability and the EnvironmentStarchForestryHorse chestnutchemistry.chemical_compoundHydrolysischemistryIonic liquidta219CelluloseWaste Management and DisposalAgronomy and Crop ScienceDissolutionta116Biomass and Bioenergy
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Direct acid-catalysed mechanical depolymerisation of fibre sludge to reducing sugars using planetary milling

2016

Abstract This study performed a direct solvent-free acid-catalysed mechanical depolymerisation of fibre sludge to reducing sugars which involves one step of acid milling in a planetary mill. The common reported ‘solvent-free’ mechanocatalytic depolymerisation of lignocellulose which includes 1) acid impregnation, 2) vacuum evaporation and 3) mechanocatalytic depolymerisation was also performed as a reference. The major converted monosaccharides were determined by capillary electrophoresis and the results of total reducing sugar (TRS) yields were carried out based on the 3,5-dinitrosalicylic acid (DNS) method. The results showed that the TRS conversion of direct acid-catalysed mechanical dep…

chemistry.chemical_classificationChromatographyRenewable Energy Sustainability and the EnvironmentChemistry020209 energyForestryOne-Step02 engineering and technologyCatalysisReducing sugarHydrolysisCapillary electrophoresisChemical engineering[CHIM.ANAL]Chemical Sciences/Analytical chemistryYield (chemistry)0202 electrical engineering electronic engineering information engineeringMonosaccharideWaste Management and DisposalAgronomy and Crop ScienceBall millComputingMilieux_MISCELLANEOUS
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Rapid one-step solvent-free acid-catalyzed mechanical depolymerization of pine sawdust to high-yield water-soluble sugars

2017

Abstract One-step absolute solvent-free acid-catalyzed mechanical depolymerization of pine sawdust (PSD) and commercially available α-cellulose to water-soluble sugars was carried out using ball milling. For comparison purposes, the commonly reported “solvent-free” mechanocatalytic depolymerization of lignocellulose method, which normally involves three steps (acid impregnation in solvent, vacuum drying, and mechanical depolymerization of lignocellulose), was performed. The 3,5-dinitrosalicylic acid (DNS) method was used to measure the total reducing sugar (TRS) of the obtained sugar solution, and major monosaccharides in the solution were analyzed by capillary electrophoresis (CE). More th…

hydrolyysisokeritmäntybiomassa020209 energylignin condensationlignin02 engineering and technologychemistry.chemical_compoundHydrolysisAcid-catalyzed mechanical depolymerization[CHIM.ANAL]Chemical Sciences/Analytical chemistryacid-catalyzed mechanical depolymerization0202 electrical engineering electronic engineering information engineeringLigninMonosaccharideOrganic chemistrychromophoresSugarWaste Management and Disposalta215ta218ComputingMilieux_MISCELLANEOUSchemistry.chemical_classificationbiomassRenewable Energy Sustainability and the EnvironmentDepolymerizationHydrolysisligniiniForestryPinus sylvestrisLignin condensationChromophoresReducing sugarSolventsawdustchemistryhydrolysissugarsYield (chemistry)[SDE]Environmental SciencesPine (Pinus sylvestris) sawdustAgronomy and Crop ScienceNuclear chemistrypine
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Dissolution and hydrolysis of fibre sludge using hydroxyalkylimidazolium hydrogensulphate ionic liquids

2014

The dissolution and hydrolysis of wet fibre sludge in ionic liquids (ILs) with different reaction conditions are performed in this study. Novel types of hydroxyalkylimidazolium hydrogensulphate ILs, [glymim]HSO4, [hemim]HSO4 and [hpmim]HSO4, are especially designed and aimed to combine the dissolution and hydrolysis of wet fibre sludge in a one-step pretreatment. The results were obtained based on the analysis of total reducing sugars (TRS) with the DNS method. The dissolution and hydrolysis of fresh wild horse chestnut fruit (Aesculus hippocastanum) with the same ILs were also carried out as a comparison reference. Since fibre sludge is cellulose based and horse chestnut fruit is starch ba…

lignoselluloosahydrolyysidissolutionhorse chestnut fruitionic liquidfibre sludge
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