Comparison of lignin and cellulose solubilities in ionic liquids by COSMO-RS analysis and experimental validation

Casas, Agustín; Palomar, José; Alonso, Mar; Oliet, Mercedes; Omar, Salama; Rodrı́guez, Francisco

doi:10.1016/j.indcrop.2011.11.032

Cited by 110 publications

(96 citation statements)

References 38 publications

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“…[12,22,23] ILs are defined as salts with melting points less than 1008C, and are frequently liquid at room temperature. Two of the most commonly encountered ILs associated with biomass dissolution are 1-ethyl-3-methylimidazolium acetate ( these ILs, as well as a range of other ILs discussed later, are illustrated in Fig.…”

Section: Dissolution Of Lignocellulosic Biomass With Ionic Liquidsmentioning

confidence: 99%

Ionic Liquids for Lignin Processing: Dissolution, Isolation, and Conversion

Hossain¹,

Aldous²

2012

Aust. J. Chem.

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We present a review on the multifunctional use of ionic liquids with respect to lignin processing. In a biorefinery context, lignocellulosics could be used to provide sustainable sources of fuels such as bioethanol, and feedstock molecules for the chemical industry such as phenols and other aromatics. However, separation of lignin from cellulose and hemicellulose is a vital step. Ionic liquids can dissolve extensive quantities of biomass, and even be designed to be multifunctional solvents. We highlight the use of ionic liquids in selectively or non-selectively dissolving lignin, the depolymerization reactions that have been attempted on lignin in ionic liquids, and the effect ionic liquids have been observed to have on such processes. Finally, we present some of the challenges and issues that must be addressed before the informed and large-scale application of ionic liquids can be realized for lignin processing.

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Section: Dissolution Of Lignocellulosic Biomass With Ionic Liquidsmentioning

confidence: 99%

Ionic Liquids for Lignin Processing: Dissolution, Isolation, and Conversion

Hossain¹,

Aldous²

2012

Aust. J. Chem.

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“…Both sugars showed high solubility for [EMIM] [EtSO 4 ] as compared to aliquat336 and aliquat [NO 3 ]. Liu et al [16] determined the solubility of glucose in IL + anti solvent mixtures at temperature of 0-60 C. [ Thus in order to study the solvation property, the solubility data of IL's in biomass components are a prerequisite for the design of separation and reaction units [18][19][20][21][22][23][24]. Further when ILs are used as solvents, there is also a possibility for its regeneration and reutilization which ultimately reduces the associated process cost [25].…”

Section: Introductionmentioning

confidence: 99%

Solubility of glucose, xylose, fructose and galactose in ionic liquids: Experimental and theoretical studies using a continuum solvation model

Mohan

Goud

Banerjee

2015

Fluid Phase Equilibria

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“…Similarly, high rates of mass removal are correlated with high rates of sugar production by hydrolysis. This correlation between mass removal [44,45] have concluded that the anion plays the main role in dissolving both cellulose and lignin. When comparing 1-allyl-3-methylimidazolium acetate or 1-allyl-3-methylimidazolium propionate with 1-allyl-3-methylimidazolium formate, Zhang et al [45] found that replacing the H in a formate anion with a CH 3 or a CH 2 CH 3 caused increased solubility of cellulose.…”

Section: Mannose/xylose Yieldmentioning

confidence: 88%

Loblolly pine pretreatment by ionic liquid-glycerol mixtures

Lynam

Coronella

2015

Biomass Conv. Bioref.

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Glycerol was used as a cosolvent with the two ionic l i q u i d s 1 -e t h y l -3 -m e t h y l i m i d a z o l i u m f o r m a t e ([C2mim][O2CH]) and 1-ethyl-3-methylimidazolium acetate ([C2mim][OAc]) to pretreat loblolly pine at 140°C. Enzymatic hydrolysis was then performed on raw and pretreated pines to establish pretreatment efficacy. With pretreatment, glucose yield from enzymatic hydrolysis was improved from 2 % for raw pine up to 43 %, while yields of mannose/xylose combined improved from 4 % up to 77 %. Pine pretreated with a 50 % [C2mim][O2CH]-50 % glycerol mixture exhibited a pulp-like structure, likely formed from removal of the lignin that binds cell walls together. Using this 50 % mixture of [C2mim][O2CH] and glycerol for pretreatment gave a slightly lower glucose yield than a 75 % mixture of [C2mim][O2CH] and glycerol but gave a mannose/xylose yield twice as high. Klason lignin and Fourier transform infrared spectroscopy (FTIR) analysis indicated that [C2mim][O2CH]-glycerol pretreatment preferentially dissolves lignin. FTIR analysis also suggested increased amorphous cellulose content with this pretreatment. Using the anti-solvent ethanol, a lignin-rich substance was precipitated from the solvent mixtures.

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Comparison of lignin and cellulose solubilities in ionic liquids by COSMO-RS analysis and experimental validation

Cited by 110 publications

References 38 publications

Ionic Liquids for Lignin Processing: Dissolution, Isolation, and Conversion

Ionic Liquids for Lignin Processing: Dissolution, Isolation, and Conversion

Solubility of glucose, xylose, fructose and galactose in ionic liquids: Experimental and theoretical studies using a continuum solvation model

Loblolly pine pretreatment by ionic liquid-glycerol mixtures

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