A grand avenue to integrate deep eutectic solvents into biomass processing

Elgharbawy, Amal A.M.; Hayyan, Maan; Hayyan, Adeeb; Basirun, Wan Jefrey; Salleh, Hamzah Mohd.; Mirghani, Mohamed Elwathig Saeed

doi:10.1016/j.biombioe.2020.105550

Cited by 73 publications

(27 citation statements)

References 159 publications

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“…Three deep eutectic solvents based on choline chloride, playing the role of a hydrogen bond acceptor (HBA) mixed with glycerol, ethylene glycol, or levulinic acid, accordingly, playing the role of a hydrogen bond donor (HBD) were prepared by mixing both compounds in a vial, under continuous stirring at 70 °C until no further solid was observed. For all three DES, the molar ratio of HBA/HBD was set to 1:2, as extensively reported in the literature. , Typically, 3–5 g of DES was prepared by weighing each compound with an analytical balance Pioneer from Ohaus (readability 0.1 mg). For all DES, masses and mol numbers are given as ±0.5%.…”

Section: Methodsmentioning

confidence: 99%

“…This includes an important effort related to the development of sustainable solvents from renewable resources, which are nontoxic, safe, environmentally friendly, that would allow the intensification of a process. In the last 2 decades, the development of new nonvolatile solvents such as ionic liquids first and, more recently, deep eutectic solvents (DES) have drawn very strong interest from the chemistry community. − A DES is based on at least two compounds that exhibit a very low melting point once mixed together, allowing the formation of liquid solvents from solid compounds, thus increasing the number of potential candidates to use in solvent design and formulation. This, combined with the fact that the DES precursors could be chosen among nontoxic compounds, makes DES promising solvents.…”

Section: Introductionmentioning

confidence: 99%

“…This, combined with the fact that the DES precursors could be chosen among nontoxic compounds, makes DES promising solvents. Their physical–chemical properties have been intensively studied in the past decade. − Applications to most chemistry fields, such as electrochemistry, liquid–liquid extraction, chromatographic separation, valuable compound dissolution, and biomass processing, ,− have also been reported and confirmed that DES can lead to new processes exhibiting both high sustainability and applicability on a pilot and industrial scale. DES have also been used in mixtures with organic solvents such as ethanol and heptane to induce phase separation .…”

Section: Introductionmentioning

confidence: 99%

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Toward a Critical Evaluation of DES-Based Organic Biphasic Systems: Are Deep Eutectic Solvents so Critical?

Chagnoleau

Papaïconomou

Jamali

et al. 2021

ACS Sustainable Chem. Eng.

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Six biphasic systems containing heptane, ethanol, and either hydrogen bond donor compounds (HBD), glycerol, ethylene glycol, levulinic acid, or the corresponding choline chloride-based DES were studied as potential extracting systems for five natural compounds, namely, quercetin, apigenin, coumarin, β-ionone, and α-tocopherol. Phase diagrams for all biphasic systems are reported. It appears that the polarity of the HBD is the most relevant property driving the phase separation and that choline chloride has only a minor influence on the phase diagram. Measurements of the partition coefficients for the five natural compounds mentioned above reveal that the influence of choline chloride on the partition coefficient of a natural compound is only significant when the latter is present in both phases. Finally, binodal curves and partition coefficients were calculated using a conductor-like screening model for real solvents (COSMO-RS). Calculated and experimental results are in good agreement, confirming that COSMO-RS is a useful and promising tool for screening such complex biphasic systems to find the most adequate system for purifying specific natural compounds.

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Toward a Critical Evaluation of DES-Based Organic Biphasic Systems: Are Deep Eutectic Solvents so Critical?

Chagnoleau

Papaïconomou

Jamali

et al. 2021

ACS Sustainable Chem. Eng.

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“…As a new class of ILs, deep eutectic solvents (DES) are the preferred alternative for the pretreatment of lignocellulosic biomass in recent times [29]. These green solvents are formed by the selection of appropriate hydrogen bond donors and hydrogen bond acceptors, which are both typically natural compounds, making this type of solvent biocompatible and biodegradable among the most noticeable green factors [30]. Furthermore, its ease of synthesis without the need for purification, as well as its lower cost, recyclability, and environmental benignity, are the most pronounced benefits compared to ILs [31].…”

Section: Introductionmentioning

confidence: 99%

Lignocellulosic Corn Stover Biomass Pre-Treatment by Deep Eutectic Solvents (DES) for Biomethane Production Process by Bioresource Anaerobic Digestion

et al. 2021

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The valorization study of the largely available corn stover waste biomass after pretreatment with deep eutectic solvent (DES) for biomethane production in one-liter glass bioreactors by anaerobic digestion for 21 days was presented. Ammonium thiocyanate and urea deep eutectic solvent pretreatments under different conditions in terms of the components ratio and temperature were examined on corn stover waste biomass. The lignocellulose biomass was characterized in detail for its chemistry and morphology to determine the effect of the pretreatment on the natural biocomposite. Furthermore, the implications on biomethane production through anaerobic digestion with different loadings of corn stover biomass at 35 g/L and 50 g/L were tested. The results showed an increase of 48% for a cumulative biomethane production for a DES-pretreated biomass, using a solid-to-liquid ratio of 1:2 at 100 °C for 60 min, which is a strong indication that DES-pretreatment significantly enhanced biomethane production.

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“…Lignocellulosic biomass is a promising carbon-based natural alternative to fossil fuel resources due to its abundant availability, low cost and renewable feature [ 1 ]. The utilization and conversion of this sustainable biomass attracted the interest from both academic and industry [ 2 ].…”

Section: Introductionmentioning

confidence: 99%

Enhancement of Lignin Extraction of Poplar by Treatment of Deep Eutectic Solvent with Low Halogen Content

Liu

Yang

et al. 2020

Polymers

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A novel choline-based deep eutectic solvent (DES) with low halogen content—namely choline lactate-lactic acid (CLL)—was synthesized by replacing the chloride anion with lactate anion in choline chloride-lactic acid (CCL). CLL and CCL treatments were conducted at 140 °C for 12 h with hydrogen bond acceptor/hydrogen bond donor =1/10, thereafter composition analysis and characterizations of the lignin extracted by DES treatment (DES lignin) and the solid residue were carried out. The proposed low halogen content DES presented an improved lignin extraction efficiency. The CLL treatment extracted 90.13% of initial lignin from poplar, while CCL extracted 86.02%. In addition, the CLL treatment also provided DES lignin with an improved purity (91.17%), lower molecular weight (Mw/Mn=1805/971 g/mol) and more concentrated distribution (polydispersity index=1.86). The efficient lignin extraction was mainly ascribed to the cleavage of β-O-4 bonds in lignin macromolecule, especially in the guaiacyl units, thereby breaking them into smaller molecules, facilitating the lignin extraction. The replacement of chloride anion allowed CLL acting as a more efficient DES to interact with lignin macromolecules, thus providing lignin with higher uniformity and suitable molecular weight. The low halogen content DES system proposed in present work could benefit the fractionation of biomass, improve the valorization of lignin compounds and facilitate industrial process in the downstream.

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A grand avenue to integrate deep eutectic solvents into biomass processing

Cited by 73 publications

References 159 publications

Toward a Critical Evaluation of DES-Based Organic Biphasic Systems: Are Deep Eutectic Solvents so Critical?

Toward a Critical Evaluation of DES-Based Organic Biphasic Systems: Are Deep Eutectic Solvents so Critical?

Lignocellulosic Corn Stover Biomass Pre-Treatment by Deep Eutectic Solvents (DES) for Biomethane Production Process by Bioresource Anaerobic Digestion

Enhancement of Lignin Extraction of Poplar by Treatment of Deep Eutectic Solvent with Low Halogen Content

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