Hydrothermal conversion of fructose to lactic acid and derivatives: Synergies of metal and acid/base catalysts

Fang, Tianqi; Liu, Mengyuan; Li, Zhaozhe; Li, Xiong; Zhang, Dongpei; Meng, Kexin; Zhang, Guangyu; Jin, Xin; Yang, Chaohe

doi:10.1016/j.cjche.2021.12.027

Cited by 5 publications

(5 citation statements)

References 164 publications

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“…Interestingly, for Ce100, the presence of glyceraldehyde is notable at lower levels than those of the other precursors, suggesting that the conversion reaction of the product to pyruvaldehyde is very rapid [41]. Previous studies report that the Bronsted and Lewis acid sites are fundamental in promoting the formation of lactic acid, with the first acting on the dehydration of triose to pyruvaldehyde and the second promoting the conversion of pyruvaldehyde to lactic acid through the 1,2 displacement of hydride [42,43].…”

Section: Resultsmentioning

confidence: 96%

Investigation of CeO2, MoO3, and Ce2(MoO4)3, Synthesized by the Pechini Method, as Catalysts for Fructose Conversion

et al. 2022

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Cerium oxide (Ce100), molybdenum oxide (Mo100), and a material containing Ce and Mo (CeMo) were synthesized by the Pechini method, using glycerol as a polyol. These materials were applied for fructose conversion in an aqueous medium. The characterization results show the formation of cerium molybdate (Ce2(MoO4)3) for CeMo. Ce100 presented good thermal stability, and Mo100 sublimation of MoO3 and polymolybdates was verified. CeMo exhibited a mass loss of 19%, associated with the sublimation of MoO3 and polymolybdate species. Additionally, the existence of Bronsted and Lewis acid sites was confirmed, and the addition of Mo to Ce was an efficient strategy to increase the acidity. Regarding the catalytic activity (150 °C and 0.5 to 6 h), Ce100 exhibited low conversions and high selectivity to 5-hydroxymethylfurfural (5-HMF). For Mo100, high conversions, with a significant formation of insoluble materials, were detected. For CeMo, beyond the high activity, a lower formation of insoluble materials was noted. In this case, selectivity toward products from the retro–aldolic route and 5-HMF were obtained. These results indicate that the main factor influencing fructose conversion is an adequate combination of the acid sites. Recycling experiments were carried out, and stability was observed for four cycles, confirming the robustness of this system.

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Section: Resultsmentioning

confidence: 96%

Investigation of CeO2, MoO3, and Ce2(MoO4)3, Synthesized by the Pechini Method, as Catalysts for Fructose Conversion

et al. 2022

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“…PLA can be directly crosslinking or postcrosslinking of PLA oligomers by ROP of lactide. PLA can be produced from the polycondensation of lactic acid or ring-opening polymerization of lactide [50]. Lactic acid was first isolated by Carl Wilhelm Schele in 1780 and synthesized from petrochemical compounds for a long time until 1980s.…”

Section: Chemical Modification Of Plamentioning

confidence: 99%

Recent Progress in Modification and Preparations of the Promising Biodegradable Plastics: Polylactide and Poly(butylene adipate-co-terephthalate)

Meng¹,

Wang²,

Xiao³

et al. 2023

Sustainable Polymer &Amp; Energy

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The acquisition of high-performance biodegradable plastics is of great significance in addressing the problem of environmental pollution of plastics. Polylactide (PLA) and poly(butylene adipate-co-terephthalate) (PBAT) are the most promising biodegradable polymers and have excellent functional properties. However, low elongation at break and impact strength of PLA and low tensile modulus and flexural strength of PBAT hinder their application. A large number of studies focus on improving the performance of PLA and PBAT and broadening their applications. In terms of polymer modification, this paper summarized recent progresses in both chemical and physical modification methods for PLA and PBAT, respectively. The properties of PLA can be improved by co-polymerization, grafting, cross-linking and blending. The properties of PBAT can be improved mainly through blending with other degradable polymers, natural macromolecules and inorganic materials. This review can provide the reference and ideas for the modification of biomass-based biodegradable plastics like PLA and fossil-based biodegradable plastics like PBAT.

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“…60 The thermocatalytic conversion of carbohydrates to LA typically faces several challenges, such as higher alkali concentrations (e.g., 2 or 3 mol L −1 ), high temperature (130-250 °C), and low reusability of catalysts. 61,62 Through the use of inexpensive semiconductors (e.g., g-C 3 N 4 , TiO 2 , and Zn 1−x Cd x S) as photocatalysts, high yields (71.5-99%) of LA could be obtained from different biomass derivatives under mild conditions (e.g., room temperature to 70 °C, 0.4-8 h, and 0.15-2 mol L −1 alkali). [63][64][65][66][67][68][69][70][71][72][73][74][75]…”

Section: Lactic Acid (La)mentioning

confidence: 99%

“…, 2 or 3 mol L −1 ), high temperature (130–250 °C), and low reusability of catalysts. 61,62 Through the use of inexpensive semiconductors ( e.g. , g-C 3 N 4 , TiO 2 , and Zn 1− x Cd x S) as photocatalysts, high yields (71.5–99%) of LA could be obtained from different biomass derivatives under mild conditions ( e.g.…”

Section: Photocatalytic Oxidation For C–c/c–o Bond Cleavagementioning

confidence: 99%

Heterogeneous photocatalysis for biomass valorization to organic acids

Liu,

Huang,

et al. 2023

Green Chem.

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Hydrothermal conversion of fructose to lactic acid and derivatives: Synergies of metal and acid/base catalysts

Cited by 5 publications

References 164 publications

Investigation of CeO2, MoO3, and Ce2(MoO4)3, Synthesized by the Pechini Method, as Catalysts for Fructose Conversion

Investigation of CeO2, MoO3, and Ce2(MoO4)3, Synthesized by the Pechini Method, as Catalysts for Fructose Conversion

Recent Progress in Modification and Preparations of the Promising Biodegradable Plastics: Polylactide and Poly(butylene adipate-co-terephthalate)

Heterogeneous photocatalysis for biomass valorization to organic acids

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