Conversion of xylose to bioproducts on bifunctional supported platinum-group metals catalysts

Oliveira, Paola C.; Canhaci, Simone J.; Gabriel, Catarine B.; Moreira, Carla R.; Farias, Andréa M. Duarte de; Fraga, Marco A.

doi:10.1016/j.crgsc.2022.100305

Cited by 3 publications

(4 citation statements)

References 50 publications

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“…It suggests that competitive side reactions predominantly take place from furfuryl alcohol at high acid concentrations, deterring its hydrolysis to valuable bioproducts. Acid‐catalyzed conversion of furfuryl alcohol to higher molecular weight compounds and polymeric species has indeed been usually reported in the literature [13,14,15,55] . 2,2’‐difurfuryl ether and 2,2’‐difurfurylmethane were identified by GC‐MS in this study, showing that etherification and homopolycondensation of furfuryl alcohol are also promoted along with its eventual degradation/polymerization (Figure 5).…”

Section: Resultssupporting

confidence: 83%

“…Acid-catalyzed conversion of furfuryl alcohol to higher molecular weight compounds and polymeric species has indeed been usually reported in the literature. [13,14,15,55] 2,2'-difurfuryl ether and 2,2'difurfurylmethane were identified by GC-MS in this study, showing that etherification and homopolycondensation of furfuryl alcohol are also promoted along with its eventual ChemCatChem degradation/polymerization (Figure 5). Contribution from the formation of higher molecular weight compounds from the desired bioproducts cannot be overlooked though.…”

Section: Chemcatchemmentioning

confidence: 56%

“…Over the last years significant advances have been achieved to obtain furfuryl alcohol direct from xylose in water, [9][10][11][12][13][14][15][16] integrating the first two steps of this whole process. In those studies, the one-pot cascade process could be promoted either over acid-metal bifunctional systems [9][10][11]15,16] or Lewis-Brønsted acidic catalysts, [12][13][14] and selectivity to furfuryl alcohol up to 90 % has been achieved. [16] Further hydrolysis of furfuryl alcohol, on the other hand, has been much less investigated and only few studies have been presented in the literature so far.…”

Section: Introductionmentioning

confidence: 99%

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Hydrolysis of Furfuryl Alcohol to Angelica Lactones and Levulinic Acid over Nb‐based Catalysts

et al. 2023

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Levulinic acid and angelica lactones are important building blocks obtained from hemicellulose. This process comprises multiple chemical reactions at which furfuryl alcohol is an intermediate, but only few studies have investigated its hydrolysis. This work studied the role played by the nature of acid sites and the impact of their strength and amount on furfuryl alcohol hydrolysis over Nb2O5 and NbOPO4. It was disclosed that production of levulinic acid is a two‐step cascade reaction at which angelica lactones are intermediates. These two hydrolysis steps were catalyzed by Brønsted acid sites with no contribution from Lewis centers. Brønsted acidity of Nb2O5 presented no activity while phosphate moieties on NbOPO4 were effective. Mixtures of organic solvent and water hindered side reactions, improving selectivity to valued bioproducts. 1,4‐dioxane was the most suitable organic solvent. This study shows that selectivity of 96 % of levulinic acid and angelica lactones can be accomplished over NbOPO4.

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Section: Resultssupporting

confidence: 83%

Section: Chemcatchemmentioning

confidence: 56%

Section: Introductionmentioning

confidence: 99%

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Hydrolysis of Furfuryl Alcohol to Angelica Lactones and Levulinic Acid over Nb‐based Catalysts

et al. 2023

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“…Xylose accounts for approximately 20-30% by weigh of lignocellulosic biomass, and d-xylose (wood sugar) is the main structure of hemicellulose [20]. The monosaccharides in cellulose and hemicellulose are released through hydrolysis [21]. Therefore, the detected acids could be generated via the hydrolysis of hemicellulose, and the dehydration reactions of d-xylose [22,23] or lignin side chains [6,24].…”

Section: Organic Acid and Total Organic Carbon Analysesmentioning

confidence: 99%

Effects of Bioliquid Recirculation on Hydrothermal Carbonization of Lignocellulosic Biomass

Lee

et al. 2022

Energies

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The characteristics of bioliquid produced through the hydrothermal carbonization (HTC) of wood wastes and the effects of recirculation on hydrochar production were analyzed. The organic acids and total organic carbon of bioliquid increased with progressive recirculation, whereas intermediate byproducts decreased. Hydrochar production by bioliquid recirculation increased mass yield, carbon content, caloric value, and energy yield of the former, while improving its quality as a solid refuse fuel. We concluded that bioliquid recirculation promoted HTC, as demonstrated by Fourier-transform infrared spectroscopy. Furthermore, contrary to predictions, a relatively constant quantity of bioliquid was generated in each step, indicating that its continuous reuse is feasible. Therefore, bioliquid recirculation can improve hydrochar production while simultaneously mitigating the environmental impact of wastewater generation. This method should be considered an important strategy toward the implementation of carbon-neutrality goals.

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Critical review of furfural and furfuryl alcohol production: Past, present, and future on heterogeneous catalysis

Jorqueira

Lima

Moya

et al. 2023

Applied Catalysis A: General

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Conversion of xylose to bioproducts on bifunctional supported platinum-group metals catalysts

Cited by 3 publications

References 50 publications

Hydrolysis of Furfuryl Alcohol to Angelica Lactones and Levulinic Acid over Nb‐based Catalysts

Hydrolysis of Furfuryl Alcohol to Angelica Lactones and Levulinic Acid over Nb‐based Catalysts

Effects of Bioliquid Recirculation on Hydrothermal Carbonization of Lignocellulosic Biomass

Critical review of furfural and furfuryl alcohol production: Past, present, and future on heterogeneous catalysis

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