ZnO as a simple and facile catalyst for acid-base coordination transformation of biomass-based monosaccharides into lactic acid

Xu, Huixing; Ye, Xin; Shi, Xiaoyu; Zhong, Heng; He, Daoping; Jin, Bong‐Soo; Jin, Fangming

doi:10.1016/j.mcat.2022.112241

Cited by 9 publications

(11 citation statements)

References 44 publications

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“…The hydroxyl and carbonyl groups in the reaction intermediates (glucose, fructose, PA) coordinate with the surface active sites, promoting every step of the mechanism, except DHA dehydration to PA. This fast reaction step is promoted by the Brønsted acidity arising from water autoprotolysis at high temperature . As for the retro-aldol step, fructose conversion is closely related to Lewis acidity, when comparing the activities of the lowly acidic SnO 2 (83% conversion) and the highly acidic MoO 3 (93% conversion).…”

Section: Heterogeneous Catalysismentioning

confidence: 99%

Homogeneous and Heterogeneous Catalysis of Glucose to Lactic Acid and Lactates: A Review

Saulnier-Bellemare,

Patience

2024

ACS Omega

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The current societal demand to replace polymers derived from petroleum with sustainable bioplastics such as polylactic acid (PLA) has motivated industry to commercialize ever-larger facilities for biobased monomers like lactic acid. Even though most of the lactic acid is produced by fermentation, long reaction times and high capital costs compromise the economics and thus limit the appeal of biotechnological processes. Catalytic conversion of hexose from biomass is a burgeoning alternative to fermentation. Here we identify catalysts to convert glucose to lactic acid, along with their proposed mechanisms. High Lewis acidity makes erbium salts among the most active homogeneous catalysts, while solvent coordination with the metal species polarize the substrate, increasing the catalytic activity. For heterogeneous catalysts, Sn-containing bimetallic systems combine the high Lewis acidity of Sn while moderating it with another metal, thus decreasing byproducts. Hierarchical bimetallic Sn-Beta zeolites combine a high number of open sites catalyzing glucose isomerization in the mesoporous regions and the confinement effect assisting fructose retro-aldol in microporous regions, yielding up to 67% lactic acid from glucose. Loss of activity is still an issue for heterogeneous catalysts, mostly due to solvent adsorption on the active sites, coke formation, and metal leaching, which impedes its large scale adoption.

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Section: Heterogeneous Catalysismentioning

confidence: 99%

Homogeneous and Heterogeneous Catalysis of Glucose to Lactic Acid and Lactates: A Review

Saulnier-Bellemare,

Patience

2024

ACS Omega

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“…[25] In addition, some heterogeneous catalysts including copper oxide, zinc oxide and modified beta catalysts were applied for glucose conversion to lactic acid. [26][27][28][29][30][31] β zeolite modulated by Y or Yb was found to exhibit a good yield of lactic acid with the value of above 45 %. Fewer byproducts were formed in the presence of more Brønsted acids contained in the catalyst, facilitating glucose transformed to lactic acid.…”

Section: Introductionmentioning

confidence: 99%

“…Insoluble or slightly soluble metal hydroxide such as Ca(OH) 2 was also adopted for glucose conversion, and showed a promising approach for the production of lactic acid [25] . In addition, some heterogeneous catalysts including copper oxide, zinc oxide and modified beta catalysts were applied for glucose conversion to lactic acid [26–31] . β zeolite modulated by Y or Yb was found to exhibit a good yield of lactic acid with the value of above 45 %.…”

Section: Introductionmentioning

confidence: 99%

Promoted Production of Lactic Acid from Glucose by Calcium Hydroxide in the Presence of Hydrogen

Li,

Yu,

Jia

et al. 2024

ChemistrySelect

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Catalytic conversion of glucose to lactic acid is a green promising strategy for the effective utilization of biomass‐derived carbohydrates to generate valuable chemicals. The generation of lactic acid would also be distinguishing in different reaction atmospheres. In this work, we firstly investigated the decomposition of lactic acid and glucose transformation to lactic acid in H2. No obvious decomposition of lactic acid was observed in H2. The activity testing results showed that glucose could be completely converted over the selected hydroxides, while the formation of lactic acid was closely related to the alkalinity of hydroxide. The yield of lactic acid was remarkably obtained to be 87 % over Ca(OH)2 at 220 °C for 3 h. Stronger alkalinity of the catalyst would facilitate glucose isomerization to fructose, and then easily be transformed into dihydroxyacetone or glyceraldehyde intermediates through reverse aldol condensation, which is beneficial to the generation of lactic acid.

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“…Consequently, solid catalysts have been extensively investigated as an alternative to homogenous catalysts. They include metal oxides, 13,14 metal-doped zeolites 15–17 and clay-based catalysts. 18–21…”

Section: Introductionmentioning

confidence: 99%

Understanding the cation exchange affinity in modified-MMT catalysts for the conversion of glucose to lactic acid

Shikh Zahari,

Che Sam,

Elzaneen

et al. 2023

RSC Adv.

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ZnO as a simple and facile catalyst for acid-base coordination transformation of biomass-based monosaccharides into lactic acid

Cited by 9 publications

References 44 publications

Homogeneous and Heterogeneous Catalysis of Glucose to Lactic Acid and Lactates: A Review

Homogeneous and Heterogeneous Catalysis of Glucose to Lactic Acid and Lactates: A Review

Promoted Production of Lactic Acid from Glucose by Calcium Hydroxide in the Presence of Hydrogen

Understanding the cation exchange affinity in modified-MMT catalysts for the conversion of glucose to lactic acid

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