Electrochemical Membrane Reactor Modeling for Lignin Depolymerization

Bawareth, Bander; Marino, Davide Di; Nijhuis, T.A.; Jestel, Tim; Weßling, Matthias

doi:10.1021/acssuschemeng.8b04670

Cited by 15 publications

(12 citation statements)

References 48 publications

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“…Park et al and Pintauro et al reported on the electrochemical oxidation and reduction of glucose to gluconic acid and sorbitol. , Governo et al elaborated on the electrochemical oxidation of xylose to xylonic acid in an alkaline medium . Electrochemical degradation of lignin to high value-added products has been exploited since the 20th century and remains popular, − because of its high yield of aromatic compounds and carbohydrates, which can serve as feedstock for various platform chemicals. ,,, …”

Section: Introductionmentioning

confidence: 99%

Electrocatalytic Reduction of Aldonic Acids to Aldoses on Gold Electrodes

Wolfsgruber

Rodrigues

Cruz

et al. 2022

ACS Sustainable Chem. Eng.

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Spent sulfite liquor, a side-stream from the pulp and paper industry, is an abundantly available carbon source for bio-based platform chemicals. The biotechnological valorization of side streams in biorefineries is hampered by the inability of many microorganisms to metabolize and deal with aldonic acids. Based on the principles of Green Chemistry, the electrochemical reduction of aldonic acids into the corresponding biomass sugars appears as a prospective process for the conversion of these acids into fermentable carbohydrates. In our paper, the investigation of electrochemical reduction of gluconic and xylonic acids into glucose and xylose, respectively, is presented. The proposed mechanism on a gold-coated silver electrode was determined via ReaxFF molecular dynamics simulations and quantum chemistry calculations. Model solutions with an aldonic acid concentration of 2.5 wt % were used for the experiments. Compared to a two-electrode compartment cell, the amounts of glucose and xylose produced in the undivided cell were more than 4 and 5.5 times higher, respectively. The electrode surface was analyzed by scanning electron microscopy, energy-dispersive X-ray spectroscopy, and X-ray photoelectron spectroscopy. Despite the relatively low conversion rate, our results show that electrochemical reduction of aldonic acids into their corresponding aldoses in model solutions is possible, which represents an important step toward side-stream valorization.

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Section: Introductionmentioning

confidence: 99%

Electrocatalytic Reduction of Aldonic Acids to Aldoses on Gold Electrodes

Wolfsgruber

Rodrigues

Cruz

et al. 2022

ACS Sustainable Chem. Eng.

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“…Later, they developed a conceptual model for lignin degradation in an ECMR and found that a membrane pore diameter of 1 nm was optimal, yielding 11 % monomers, <2 % CO 2 , and water versus 70 % organic acids (from continuous degradation of aromatics), 30 % CO 2 , and water in a batch reactor. Monomer yield increased as a function of membrane area (optimal 0.01 m 2 ) and transmembrane pressure (optimal 1.4 bar); going beyond these optimal values would only increase capital cost without any significant effect on product yield …”

Section: Electrocatalytic Treatment Of Ligninmentioning

confidence: 96%

“…[113] Later,t hey developed ac onceptual model for lignin degradation in an ECMR andf ound that am embrane pore diameter of 1nmw as optimal, yielding 11 %m onomers, < 2% CO 2 ,a nd water versus 70 %o rganic acids (from continuous degradation of aromatics), 30 %C O 2 ,a nd water in ab atch reactor.M onomer yield increased as af unction of membrane area (optimal 0.01 m 2 )a nd transmembrane pressure (optimal 1.4 bar);g oing beyondt hese optimal valuesw ould only increase capital cost withouta ny significant effect on product yield. [114] Alternatively, Di Marinoe tal. specifically targeted electrochemicald epolymerization of lignin to carboxylic acids in addition to phenolic monomers in a" swiss roll" electrochemical reactor with Ni foam electrode.…”

Section: Nickel- Cobalt- and Nickel-cobalt-based Electrodesmentioning

confidence: 99%

“…Recent studies have introduced product-separation systems(use of membrane reactorsand nanofiltration coupled with flow reactors) that can help overcome this barrier. [107,111,112,114] Such separation systemscan further benefit from adeeper understanding of the kinetics that govern the electrochemical degradation process, thus providing at ool for timely separationand removal of products to avoid overoxidation; however kinetic and mechanistic studies of lignin electrochemical degradation are lacking in the literature. Oxidation products:…”

Section: Lignin For Fabrication Of Electrodem Aterials For Lithium Anmentioning

confidence: 99%

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Greener Routes to Biomass Waste Valorization: Lignin Transformation Through Electrocatalysis for Renewable Chemicals and Fuels Production

et al. 2020

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Lignin valorization is essential for biorefineries to produce fuels and chemicals for a sustainable future. Today's biorefineries pursue profitable value propositions for cellulose and hemicellulose; however, lignin is typically used mainly for its thermal energy value. To enhance the profit potential for biorefineries, lignin valorization would be a necessary practice. Lignin valorization is greatly advantaged when biomass carbon is retained in the fuel and chemical products and when energy quality is enhanced by electrochemical upgrading. Though lignin upgrading and valorization are very desirable in principle, many barriers involved in lignin pretreatment, extraction, and depolymerization must be overcome to unlock its full potential. This Review addresses the electrochemical transformation of various lignins with the aim of gaining a better understanding of many of the barriers that currently exist in such technologies. These studies give insight into electrochemical lignin depolymerization and upgrading to value‐added commodities with the end goal of achieving a global low‐carbon circular economy.

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“…TGA test shows that Catalpa ovata G. Don. has certain thermal stability, and also has high resource utilization potential and relatively efficient utilization [35].…”

Section: Analysis Of Td-gc-msmentioning

confidence: 99%

Catalpa ovata G. Don. potential medicinal value of leaves

et al. 2020

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Catalpa ovata G. Don. has a certain degree of appreciation because of its unique tree shape and wide crown. It also has certain adaptability. This experiment uses organic materials such as Fourier transform infrared (FT-IR) spectroscopy, gas chromatography-mass spectrometer (GC-MS), learning content management system, thermal desorption-GC-MS, termal gravimetric analyzer and other modern techniques to extract organic reagents from Catalpa ovata G. Don's Leaves. The original powder was tested differently and analyzed, investigated. To explored and developed its potential medicinal value, and better understood its use in biomedicine, as well as perfumery and chemical industries, providing some research for further and in-depth research basis.

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Electrochemical Membrane Reactor Modeling for Lignin Depolymerization

Cited by 15 publications

References 48 publications

Electrocatalytic Reduction of Aldonic Acids to Aldoses on Gold Electrodes

Electrocatalytic Reduction of Aldonic Acids to Aldoses on Gold Electrodes

Greener Routes to Biomass Waste Valorization: Lignin Transformation Through Electrocatalysis for Renewable Chemicals and Fuels Production

Catalpa ovata G. Don. potential medicinal value of leaves

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