Recent advances in organosolv fractionation: Towards biomass fractionation technology of the future

Thoresen, Petter Paulsen; Μάτσακας, Λεωνίδας; Rova, Ulrika; Christakopoulos, Paul

doi:10.1016/j.biortech.2020.123189

Cited by 113 publications

(82 citation statements)

References 110 publications

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“…The ethanol as an end-product or as a pretreatment solvent could be recirculated through the system through already installed distillation columns and evaporators. Such integration strategy contributes to a needed holistic approach for cost-effective organosolv pretreatment processes, where optimization of pretreatment parameters leading to efficient material fractionation, need to be coupled with efficient fraction separation and solvent recycling methods [48]. By leading to lower energy consumption, the use of distillation is preferable to the use of evaporation for solvent recycling in systems containing water/low-boiling point organic solvent such as ethanol [48].…”

Section: Discussionmentioning

confidence: 99%

“…Such integration strategy contributes to a needed holistic approach for cost-effective organosolv pretreatment processes, where optimization of pretreatment parameters leading to efficient material fractionation, need to be coupled with efficient fraction separation and solvent recycling methods [48]. By leading to lower energy consumption, the use of distillation is preferable to the use of evaporation for solvent recycling in systems containing water/low-boiling point organic solvent such as ethanol [48]. Reasonably, the extent of dilution of the black liquor will influence the energy consumption during distillation; therefore, studies on optimization of the amount of water added to induce lignin precipitation are also of relevance.…”

Section: Discussionmentioning

confidence: 99%

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Recovery of High Purity Lignin and Digestible Cellulose from Oil Palm Empty Fruit Bunch Using Low Acid-Catalyzed Organosolv Pretreatment

et al. 2020

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The lignocellulosic residue from the palm oil industry, oil palm empty fruit bunch (OPEFB), represents a challenge to both producing industries and environment due to its disposal difficulties. Alternatively, OPEFB can be used for the production of valuable products if pretreatment methods, which overcome OPEFB recalcitrance and allow tailored valorization of all its carbohydrates and lignin, are developed. Specifically, high-value applications for lignin, to increase its contribution to the feasibility of lignocellulosic biorefineries, demand high-purity fractions. In this study, acid-catalyzed organosolv using ethanol as a solvent was used for the recovery of high-purity lignin and digestible cellulose. Factors including catalyst type and its concentration, temperature, retention time, and solid-to-liquid (S/L) ratio were found to influence lignin purity and recovery. At the best conditions (0.07% H2SO4, 210 °C, 90 min, and S/L ratio of 1:10), a lignin purity and recovery of 70.6 ± 4.9% and 64.94 ± 1.09%, respectively, were obtained in addition to the glucan-rich fraction. The glucan-rich fraction showed 94.06 ± 4.71% digestibility within 18 h at an enzyme loading of 30 filter paper units (FPU) /g glucan. Therefore, ethanol organosolv can be used for fractionating OPEFB into three high-quality fractions (glucan, lignin, and hemicellulosic compounds) for further tailored biorefining using low acid concentrations. Especially, the use of ethanol opens the possibility for integration of 1st and 2nd generation ethanol benefiting from the separation of high-purity lignin.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Recovery of High Purity Lignin and Digestible Cellulose from Oil Palm Empty Fruit Bunch Using Low Acid-Catalyzed Organosolv Pretreatment

et al. 2020

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“…Hence, an ideal organosolv treatment should address the problem. Thoresen et al (2020) summarized how to choose the solvent and improve the component separation as well as the potential for solvent recycle.…”

Section: Organosolv Pretreatmentmentioning

confidence: 99%

Advances in Pretreatment of Straw Biomass for Sugar Production

Tan

et al. 2021

Front. Chem.

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Straw biomass is an inexpensive, sustainable, and abundant renewable feedstock for the production of valuable chemicals and biofuels, which can surmount the main drawbacks such as greenhouse gas emission and environmental pollution, aroused from the consumption of fossil fuels. It is rich in organic content but is not sufficient for extensive applications because of its natural recalcitrance. Therefore, suitable pretreatment is a prerequisite for the efficient production of fermentable sugars by enzymatic hydrolysis. Here, we provide an overview of various pretreatment methods to effectively separate the major components such as hemicellulose, cellulose, and lignin and enhance the accessibility and susceptibility of every single component. This review outlines the diverse approaches (e.g., chemical, physical, biological, and combined treatments) for the excellent conversion of straw biomass to fermentable sugars, summarizes the benefits and drawbacks of each pretreatment method, and proposes some investigation prospects for the future pretreatments.

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“…Among the processes well coping with the specifications of new market flows, organosolv pulping has received a renewed interest. [7,8] The use of organic solvents in pulping process allows an efficient recovery of the lignin fraction from the lignocellulosic biomass but has always been a niche industrial reality, due to the competition of fossil-derived products on the market of lignin-derived molecules. The implementation of second generation ethanol plants has opened a new window of opportunity for organosolv treatments, in which the added value of lignin extraction is boosted by the production of valuable easilyfermentable cellulose [9][10][11].…”

Section: Introductionmentioning

confidence: 99%

Copper-nickel mixed oxide catalysts from layered double hydroxides for the hydrogen-transfer valorisation of lignin in organosolv pulping

Awan

Beltrami

Bonincontro

et al. 2021

Applied Catalysis A: General

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Copper and nickel mixed catalysts obtained by the calcination of iron and aluminium hydrotalcites (layered double hydroxides, LDH) have been tested for the conversion of a lignin model dimer in subcritical methanol. The phase distribution and the textural properties of the catalysts were characterized by X-ray diffraction Rietveld analysis and N2 physisorption. The presence of copper was critical for effective hydrogenation, both by direct hydrogen transfer from methanol to aldehyde groups and by the reactivity of products from methanol reforming.TPR experiments showed that the hydrogenation activity was promoted by an enhanced reducibility of the Cu-catalysts, related to the presence of other oxide components.

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Recent advances in organosolv fractionation: Towards biomass fractionation technology of the future

Cited by 113 publications

References 110 publications

Recovery of High Purity Lignin and Digestible Cellulose from Oil Palm Empty Fruit Bunch Using Low Acid-Catalyzed Organosolv Pretreatment

Recovery of High Purity Lignin and Digestible Cellulose from Oil Palm Empty Fruit Bunch Using Low Acid-Catalyzed Organosolv Pretreatment

Advances in Pretreatment of Straw Biomass for Sugar Production

Copper-nickel mixed oxide catalysts from layered double hydroxides for the hydrogen-transfer valorisation of lignin in organosolv pulping

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