Fast Pyrolysis of Flax Shive in a Screw‐Type Reactor

Lugovoy, Yury V.; Chalov, K.V.; Tarabanko, Valery E.; Stepacheva, Аntonina A.; Kosivtsov, Yu. Yu.

doi:10.1002/ceat.202100251

Cited by 7 publications

(2 citation statements)

References 36 publications

(51 reference statements)

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“…There is a great variety of agricultural wastes, and one of them is flax shives. They are produced (up to 70 wt.% of raw flax) during the processing of the plant into cellulose fibers and are characterized by high lignin content (20-28%) and good yield (up to 20%) of aromatic aldehydes, e.g., vanillin and syringaldehyde, in oxidation via oxygen or nitrobenzene [2,4,5], also performing well in hydrogenolysis and pyrolysis [6,7].…”

Section: Introductionmentioning

confidence: 99%

Mass Transfer in the Processes of Native Lignin Oxidation into Vanillin via Oxygen

Tarabanko,

Kaygorodov,

Kazachenko

et al. 2023

Catalysts

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The influence of mass transfer intensity on the kinetics of the catalytic oxidation of flax shives with oxygen in alkaline media to aromatic aldehydes and pulp was studied. The process was carried out in two autoclaves, with moderate stirring (stirrer engine of 8 W) and intense stirring (stirrer engine of 200 W). The oxidation of flax shives into vanillin, syringaldehyde, and pulp was shown to proceed as a completely diffusion-controlled process under the studied conditions, both moderate and intense stirring. Depending on the process conditions, it can be limited by stages of oxygen transfer through the diffusion boundary layer near the gas–liquid interface (low intensity of mass transfer) as well as by reagents’ inner diffusion in the porous and solid matter of the flax shive particle (high intensity of mass transfer). The results on the influence of the stirring speed and volume of the reaction mass on the rates of oxygen consumption and vanillin accumulation were obtained. They were described using a known simple model connecting the intensity of mass transfer and the stirring power density in the bulk of the liquid phase in terms of algebra equations.

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Section: Introductionmentioning

confidence: 99%

Mass Transfer in the Processes of Native Lignin Oxidation into Vanillin via Oxygen

Tarabanko,

Kaygorodov,

Kazachenko

et al. 2023

Catalysts

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“…Lignin pyrolysis tars (bio-oil) can contain up to 90% alkyl guaiacols, including 25-35% guaiacol [5]. Catalysts are able to increase the yield of bio-oil, but they do not permit to orient pyrolysis to the highly selective formation of individual phenols [6,7].…”

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confidence: 99%