Abstract:In
this work, acidic oxidation in a biphasic water/octanol system
was applied to mitigate condensation and increase the yields of high-value
aromatic monomers from Kraft lignin, a waste product, and an industrially
relevant feedstock. Biphasic depolymerization (BPD) is a one-pot multistep
technique in which target molecules are protected from degradation
in the reactive aqueous milieu (necessary for the cleavage of β-O-4
bonds as well as the recalcitrant high dissociation energy carbon–carbon
moieties) by an i… Show more
“…8a. 120 The water/octanol biphasic system allows the in situ transfer of the product into the protective octanol phase, thus avoiding the formation of side reactions and slowing down the deposition of carbonaceous matter. Clearly, the use of the water–oil biphasic system hinders the deactivation of the active site, while optimizing the quality of the product and simplifying the separation step.…”
Section: Application Of Water–oil Biphasic Systems To Biomassmentioning
confidence: 99%
“…8a. 120 The water/octanol biphasic system allows the in situ transfer of the product into the protective octanol phase, thus avoiding the formation of side reactions and slowing down the deposition of carbonaceous matter.…”
Section: Hdo Of Ligninmentioning
confidence: 99%
“…8 (a) In situ catalytic conversion of lignin in the water/octanol biphasic system. 120 (b) The selective HDO of lignin to low molecular weight bio-oil over a Mo-Ru/AC catalyst. 127 Fig.…”
“…8a. 120 The water/octanol biphasic system allows the in situ transfer of the product into the protective octanol phase, thus avoiding the formation of side reactions and slowing down the deposition of carbonaceous matter. Clearly, the use of the water–oil biphasic system hinders the deactivation of the active site, while optimizing the quality of the product and simplifying the separation step.…”
Section: Application Of Water–oil Biphasic Systems To Biomassmentioning
confidence: 99%
“…8a. 120 The water/octanol biphasic system allows the in situ transfer of the product into the protective octanol phase, thus avoiding the formation of side reactions and slowing down the deposition of carbonaceous matter.…”
Section: Hdo Of Ligninmentioning
confidence: 99%
“…8 (a) In situ catalytic conversion of lignin in the water/octanol biphasic system. 120 (b) The selective HDO of lignin to low molecular weight bio-oil over a Mo-Ru/AC catalyst. 127 Fig.…”
“…This is followed by an oxygen assault that produces a peroxy radical. 17 The obtained quinone ring is no longer stable, so the water molecule will attack at the C α position. Finally, the electron density at C α -OH will resonate to generate the carbonyl product and water molecule via cleavage of C α -C β bond.…”
Section: Plausible Mechanismmentioning
confidence: 99%
“…They reported a total of 64 monomers after depolymerization demonstrating the capability of the catalytic system to fragment the links but selectivity was poor. 17 Likewise, Zhang et al carried out lignin oxidation to vanillin (10.9 wt%) using CuSO 4 (10 wt%) as a catalyst, and H 2 O 2 as oxidant at 140 °C. The selectivity of vanillin was not covered in this study, and industrial use is challenging due to the high temperature.…”
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