Dissolution and hydrolysis of fibre sludge using hydroxyalkylimidazolium hydrogensulphate ionic liquids

Dong, Yue; Holm, Jana; Kärkkäinen, Johanna; Nowicki, Janusz; Lassi, Ulla

doi:10.1016/j.biombioe.2014.09.013

Cited by 10 publications

(5 citation statements)

References 14 publications

(17 reference statements)

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“…The preparation of ILs 4-9 required a well-known two steps procedure. The hydroxyl functionalized chloride ILs [48] were first converted into the corresponding hydroxides by passing them through an anion exchange resin [49], neutralized by corresponding fatty acids and carefully purified [50].…”

Section: Methodsmentioning

confidence: 99%

Surface active fatty acid ILs: Influence of the hydrophobic tail and/or the imidazolium hydroxyl functionalization on aggregates formation

Mezzetta

Łuczak

Woch

et al. 2019

Journal of Molecular Liquids

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Nine structurally-related fatty acid ionic liquids have been prepared and their thermal behavior as well as their ability to self-assemble in water has been investigated. The thermal properties were studied by thermal gravimetric analysis (TGA) and differential scanning calorimetry (DSC), while the aggregation behavior was analyzed by tensiometry, isothermal titration calorimetry (ITC), conductometry, dynamic light scattering (DLS), and electrophoretic light scattering (ELS).Structural variations concerned both the imidazolium cation (presence or not of hydroxyl groups) and the anion (length of the fatty acid), and affected in different ways the ILs' properties.With regards to the thermal stability, the presence of the hydroxyl group on the cation had a beneficial effect on stability regardless of the anion's length. This latter played instead a major role in allowing the solubility of the ILs in water (C18-stearate ILs were not soluble in water) and in determining the critical micelle concentration (CMC) values, as the reduction of the anion length in moving from C16-palmitate to C14-myristate anions disfavors aggregates formation.Several other parameters characterizing the adsorption of fatty acid ILs at the air/water interface, some thermodynamic parameters of the aggregation process as well as size distribution and stability of the aggregates were also determined.

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Section: Methodsmentioning

confidence: 99%

Surface active fatty acid ILs: Influence of the hydrophobic tail and/or the imidazolium hydroxyl functionalization on aggregates formation

Mezzetta

Łuczak

Woch

et al. 2019

Journal of Molecular Liquids

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“…Lignocellulose-based solid residuals, such as sawdust, bark, and peat, have long been used as major wood fuels in the forest industry in Finland [1] [2]. In general, approximately 500,000-600,000 tons of ash are generated annually by the forest industry and power plants in Finland, with most of this ash traditionally disposed of in landfills [1].…”

Section: Introductionmentioning

confidence: 99%

Rapid one-step solvent-free acid-catalyzed mechanical depolymerization of pine sawdust to high-yield water-soluble sugars

Dong

Haverinen

Tuuttila

et al. 2017

Biomass and Bioenergy

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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 "solventfree" 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 than 90% of the PSD became water-soluble through milling. Furthermore, most of the PSD was converted into TRS in approximately 30 min, and the highest TRS yield obtained was 31%, based on the dry mass. Interestingly, the TRS solutions obtained from the processed PSD were much darker than those obtained from α-cellulose due to the chromophores that formed during the depolymerization of lignin.

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“… 8,14 Moreover, functional acidic MILs including hydroxyalkylimidazolium hydrogen sulphate and 1-(sulfobutyl)-3-methylimidazolium chloride have been employed as both catalysts and solvents to degrade lignocelluloses. 9,10 However, these MILs with Cl − or CH 3 COO − as the anions are completely water-miscible. 21 …”

Section: Introductionmentioning

confidence: 99%

Synthesis of functional dicationic ionic liquids for the treatment of lignocellulosic biomass

Zhang

Wang

et al. 2022

RSC Adv.

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Dissolution and hydrolysis of fibre sludge using hydroxyalkylimidazolium hydrogensulphate ionic liquids

Abstract: 11The dissolution and hydrolysis of wet fibre sludge in ionic liquids (ILs) with different reaction 12 conditions are performed in this study. Novel types of hydroxyalkylimidazolium hydrogensulphate 13 ILs in one-step dissolution and hydrolysis were analysed based on the results. 20

Cited by 10 publications

References 14 publications

Surface active fatty acid ILs: Influence of the hydrophobic tail and/or the imidazolium hydroxyl functionalization on aggregates formation

Surface active fatty acid ILs: Influence of the hydrophobic tail and/or the imidazolium hydroxyl functionalization on aggregates formation

Rapid one-step solvent-free acid-catalyzed mechanical depolymerization of pine sawdust to high-yield water-soluble sugars

Synthesis of functional dicationic ionic liquids for the treatment of lignocellulosic biomass

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