Ionic liquid solvent properties as predictors of lignocellulose pretreatment efficacy

Doherty, Thomas V.; Mora-Pale, Mauricio; Foley, Sage E.; Linhardt, Robert J.; Dordick, Jonathan S.

doi:10.1039/c0gc00206b

Cited by 290 publications

(247 citation statements)

References 53 publications

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“…The ionic liquid (1:1 mixture) was a viscous liquid at room temperature. 15 We have chosen to depict the proton transfer equilibrium being completely on the product side. However, it must be considered that proton transfer from acid to base may be incomplete, resulting in tertiary mixtures (acid, base and salt).…”

Section: Resultsmentioning

confidence: 99%

Fractionation of lignocellulosic biomass with the ionic liquid 1-butylimidazolium hydrogen sulfate

et al. 2014

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The application of the protic ionic liquid 1-butylimidazolium hydrogen sulfate in the deconstruction (aka pretreatment) and fractionation of lignocellulosic biomass has been investigated. A cellulose rich pulp and a lignin fraction were produced. The pulp was subjected to enzymatic saccharification which allowed recovery of up to 90% of the glucan as fermentable glucose. The influence of the solution acidity on the deconstruction of Miscanthus giganteus was examined by varying the 1-butylimidazole to sulfuric acid ratio. Increased acidity led to shorter pretreatment times and resulted in reduced hemicellulose content in the pulp. Addition of water to the ionic liquid resulted in enhanced saccharification yields. The ability to tune acidity through the use of protic ionic liquids offers a significant advantage in flexibility over dialkylimidazolium analogues. † Electronic supplementary information (ESI) available. See

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Section: Resultsmentioning

confidence: 99%

Fractionation of lignocellulosic biomass with the ionic liquid 1-butylimidazolium hydrogen sulfate

et al. 2014

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“…Furthermore phosphonium ILs have high pretreatment beta numbers (x > 1.0), indicating efficient extraction of lignin (Doherty et al 2010). Several studies have demonstrated compatibility between microorganisms and phosphonium ILs (Doherty et al 2010; Abe et al 2012).…”

Section: Introductionmentioning

confidence: 99%

“…Tetra butyl was specifically selected based on the presence of chlorine, which is considered a good anion for biomass processing (Doherty et al 2010;Abe et al 2012). Preservation methods included plating and cryopreservation with the addition of cryoprotectants.…”

Section: Introductionmentioning

confidence: 99%

Enrichment of microbial communities tolerant to the ionic liquids tetrabutylphosphonium chloride and tributylethylphosphonium diethylphosphate

Pace

Ceballos

Harrold

et al. 2016

Appl Microbiol Biotechnol

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Aims: The aims of this study were to identify thermophilic microbial communities that degrade green waste in the presence of the ionic liquids (IL) tetrabutylphosphonium chloride and tributylethylphosphonium diethylphosphate and examine preservation methods for IL tolerant communities.Methods and Results: High-solids incubations with step-wise increases in IL concentration were conducted to enrich for thermophilic IL tolerant communities. 16S rRNA sequencing of enriched communities revealed microorganisms capable of tolerating high levels of IL. Cryogenic preservation of enriched communities reduced the IL tolerance of the community and decreased the relative abundance of IL tolerant organisms. The use of cryoprotectants did not have an effect on microbial activity on green waste of the stored community. Conclusions:Step-wise increases in IL facilitated the enrichment of thermophilic, IL tolerant microbial communities that decomposed green waste. Alternative community storage and revival methods are necessary for maintenance and recovery of IL-tolerant communities.Significance and Impact of Study: A successful approach was developed to enrich communities that decompose green waste in thermophilic high-solids environments in the presence of IL. The enriched communities provide a targeted source of enzymes for the bioconversion of IL-pretreated green waste for conversion to biofuels.

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“…[126]. Moreover, IL pretreatment could improve lignocellulose enzymatic saccharification in biomass samples with low cellulose CrI and low lignin levels [127][128][129][130], by comparison mild alkali pretreatment in Miscanthus efficiently extracts G-rich lignin for high biomass digestibility [125]. Recently, in Miscanthus stem have presented that two-step pretreatments with 2% NaOH and 1% H 2 SO 4 are optimal for improving biomass digestion in hemicelluloses-rich samples via the efficient co-extraction of hemicelluloses and lignin [131][132][133][134][135].…”

Section: Chemical Pretreatmentmentioning

confidence: 99%

“…Lately, ionic liquid (IL) is also known as one of the most favorable pretreatment which can solubilize and separate cellulose from other plant cell wall efficiently at mild temperature [121][122][123][124][125]. [126].…”

Section: Chemical Pretreatmentmentioning

confidence: 99%

Advances in Genetic Manipulation of Lignocellulose to Reduce Biomass Recalcitrance and Enhance Biofuel Production in Bioenergy Crops

Madadi¹,

Penga²,

Abbas³

2017

J Plant Biochem Physiol

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Lignocellulose biomass derived from plant cell walls is a rich source of biopolymers for the production of biofuels. Biomass recalcitrance is the noticeable and main features of lignocellulose which can reduces by genetic modification of plant cell wall. The aim of the present review is to provide the reader a new insight for enhancing biomass yield and biofuels production. This can be issued by focusing on major perennial grasses, cereal crops and woody feedstock which have high biomass yield or large biomass residues and also the effects of distinctive cell wall polymers (cellulose, hemicellulose, lignin, and pectin) on the enzymatic saccharification of biomass under different pretreatments. Moreover the present review paper will also major gene candidates which are involved plant cell wall biosynthesis, degradation and modification for improving biomass yield and digestibility in transgenic plants and genetic mutants.

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Ionic liquid solvent properties as predictors of lignocellulose pretreatment efficacy

Cited by 290 publications

References 53 publications

Fractionation of lignocellulosic biomass with the ionic liquid 1-butylimidazolium hydrogen sulfate

Fractionation of lignocellulosic biomass with the ionic liquid 1-butylimidazolium hydrogen sulfate

Enrichment of microbial communities tolerant to the ionic liquids tetrabutylphosphonium chloride and tributylethylphosphonium diethylphosphate

Advances in Genetic Manipulation of Lignocellulose to Reduce Biomass Recalcitrance and Enhance Biofuel Production in Bioenergy Crops

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