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Alekseev, O. A.; Shamsutdinov, M. É.; Kutyshev, F. Kh.; Kostochko, A. V.

doi:10.1023/a:1002820826226

Cited by 2 publications

(3 citation statements)

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“…However, in the pulp and paper industry and the emerging cellulosic ethanol industry, lignin is considered to be a waste product and is currently mostly burned to generate process heat. 4−8 For biochemical production of ethanol, a pretreatment of the lignocellulosic biomass is needed to make the carbohydrates accessible for enzymes. Steam explosion (SE) is a treatment with a high industrial potential, as it has a low cost for energy and does not need addition of other chemicals than steam, thereby producing no extra waste.…”

Section: Introductionmentioning

confidence: 99%

“…This renewable material has the potential to replace depleting fossil resources for the production of energy, chemicals, and fuels. − Lignin is the most abundant renewable aromatic polymer on the planet and is found in all types of lignocellulosic biomass. However, in the pulp and paper industry and the emerging cellulosic ethanol industry, lignin is considered to be a waste product and is currently mostly burned to generate process heat. − For biochemical production of ethanol, a pretreatment of the lignocellulosic biomass is needed to make the carbohydrates accessible for enzymes. Steam explosion (SE) is a treatment with a high industrial potential, as it has a low cost for energy and does not need addition of other chemicals than steam, thereby producing no extra waste. − SE is both a chemical and physical treatment.…”

Section: Introductionmentioning

confidence: 99%

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Characterization of Pseudo-Lignin from Steam Exploded Birch

et al. 2018

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There is a growing interest in a more wholesome utilization of biomass as the need for greener chemistry and non-mineral oil-based products increases. Lignin is the largest renewable resource for aromatic chemicals, which is found in all types of lignocellulosic biomass. Steam-explosion of lignocellulosic biomass is a useful pretreatment technique to make the polymeric material more available for processing. However, this heat-based pretreatment is known to result in the formation of pseudo-lignin, a lignin-like polymer made from carbohydrate degradation products. In this work, we have analyzed steam-exploded birch with a varying severity factor (3.1–5.0) by pyrolysis–gas chromatography–mass spectrometry, 2D-NMR, and Fourier transform infrared spectroscopy. The main results reveal a consumption of acetic acid at higher temperatures, with the increase of furan components in the pyrolyzate. The IR and NMR spectral data support these results, and there is a reason to believe that the conditions for humin formation are accomplished under steam explosion. Pseudo-lignin seems to be a humin-like compound.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Characterization of Pseudo-Lignin from Steam Exploded Birch

et al. 2018

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“…However, lignin-based materials have hardly been in practical human life, and the utilization of lignin has not yet been successfully achieved. At the moment, most industrially discharged lignin is burned, and the limited lignin is just utilized for a few purposes, such as dispersants − or pellet binder materials. , Alkali kraft lignin is discharged mainly as a byproduct in the pulping process. Kraft lignin is burned for the recovery of energy for the pulping process, and that is not used as feedstock for valuable chemicals.…”

Section: Introductionmentioning

confidence: 99%

Selective Production of Organic Acids and Depolymerization of Lignin by Hydrothermal Oxidation with Diluted Hydrogen Peroxide

et al. 2011

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There has been a great interest in converting lignin into chemicals, but lignin is not used as feedstock for chemical production at present. Considering the rigid structure of lignin, we have developed a new method to recover chemicals from lignin under severe conditions. This method is the hydrothermal oxidative degradation using 0.1% hydrogen peroxide solution in the flow reactor at 150-200 °C. When alkali lignin was oxidized for 2 min at 200 °C, the total yield of organic acids was as large as 0.45 g/g-lignin. The organic acids consisted of formic, acetic, and succinic acids, and the high-molecular-weight lignin also remained after the oxidation. On the other hand, when organosolv lignin was oxidized at 160 °C, lignin molecules were depolymerized into the oligomer of M W = ca. 300 and the total yield of organic acids was 0.20 g/g-lignin. The product distribution depended on the difference in the structures between the two lignin samples. It was clarified that the proposed method is valid to produce valuable chemicals from any kind of lignin.

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Cited by 2 publications

References 1 publication

Characterization of Pseudo-Lignin from Steam Exploded Birch

Characterization of Pseudo-Lignin from Steam Exploded Birch

Selective Production of Organic Acids and Depolymerization of Lignin by Hydrothermal Oxidation with Diluted Hydrogen Peroxide

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