Selective production of dihydroxyacetone and glyceraldehyde by photo-assisted oxidation of glycerol

Mendoza, Arisbeht; Romero, Rubı́; Gutiérrez-Cedillo, Galilea P.; López-Téllez, Gustavo; Lorenzo-González, Omar; Gómez-Espinosa, Rosa María; Natividad, Reyna

doi:10.1016/j.cattod.2019.09.035

Cited by 20 publications

(16 citation statements)

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“…Catalysts 2022, 12, x FOR PEER REVIEW 9 of 27 Figure 8a shows the GCD concentration profiles with a maximum concentration at 6 h of reaction for all catalyst loadings, as a result of oxidation. The formation of glyceraldehyde is related to the attack of hydroxyl radicals on the glycerol molecule in the C1 position in comparison with the reactivity in the C2 position towards the formation of dihydroxyacetone [50]; however, in this study, the generation of dihydroxyacetone was negligible since the abstraction of the first hydrogen is favored (see Figure 9) [51]. The subsequent oxidation of glyceraldehyde by hydroxyl radicals can form other byproducts, such as formic acid and formaldehyde, this is due to the incision of the C-C bonds in the organic molecule [46].…”

Section: Glycerol Photo-oxidation 221 Effect Of Catalyst Loadingmentioning

confidence: 57%

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Photo-Oxidation of Glycerol Catalyzed by Cu/TiO2

et al. 2022

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In the present study, glycerol was oxidized by photocatalysis to glyceraldehyde, formaldehyde, and formic acid. Copper-doped TiO2 was synthesized by the evaporation-induced self-assembly approach and it was used as catalyst during the glycerol photo-oxidation reactions. The prepared mesoporous material exhibited high specific surface area (242 m2/g) and band gap energy reduction of 2.55 eV compared to pure titania (3.2 eV) by the synthesis method due to the presence of copper cations (Cu2+ identified by XPS). The catalyst showed only anatase crystalline phase with nanocrystals around 8 nm and irregular agglomerates below 100 μm. The selectivity and formation rate of the products were favored towards formaldehyde and glyceraldehyde. The variables studied were catalyst amount, reaction temperature, and initial glycerol concentration. The response surface analysis was used to evaluate the effect of the variables on the product’s concentration. The optimized conditions were 0.4 g/L catalyst, 0.1 mol/L glycerol, and temperature 313.15 K. The response values under optimal conditions were 3.23, 8.17, and 1.15 mM for glyceraldehyde, formaldehyde, and formic acid, respectively. A higher selectivity towards formaldehyde was observed when visible light was used as the radiation source. This study is useful to evaluate the best reaction conditions towards value-added products during the oxidation of glycerol by photocatalysis using Cu/TiO2.

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Section: Glycerol Photo-oxidation 221 Effect Of Catalyst Loadingmentioning

confidence: 57%

“…It can also be observed in Figure 17 that the glycerol oxidation also proceeds with UV light only. This might be due to the production of hydroxyl radicals from hydrogen peroxide that is being produced via the following two reactions [51],…”

Section: Optimizationmentioning

confidence: 99%

Photo-Oxidation of Glycerol Catalyzed by Cu/TiO2

et al. 2022

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“…[109,[229][230][231][232][233][234] BiVO 4 has been one of the most extensively studied catalysts applied for PEC GOR in water splitting systems. [109,[229][230][231] Wu et al demonstrated the generation of some possible products including GALD, DHA, GCALD, FA, and FMALD from PEC glycerol conversion on BiVO 4 -based photoanode could be controlled by utilizing NiO x (OH) y cocatalyst and varying the pH of electrolytes at different applied biases without precious metal catalysts. [229] Recently, benzyl alcohol (BA) and its derivatives have emerged as feedstocks for green synthesis aromatic compounds by the photo-electrooxidation reaction.…”

Section: Higher Value-added Productionmentioning

confidence: 99%

Alternatives to Water Photooxidation for Photoelectrochemical Solar Energy Conversion and Green H₂ Production

Daiyan

Nguyen

et al. 2022

Advanced Energy Materials

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Photoelectrochemical (PEC) water splitting is considered a promising technology to produce renewable hydrogen, a clean fuel or energy carrier to replace conventional carbon‐based fossil‐fuel sources. Nevertheless, the overall solar‐to‐hydrogen efficiency and the cost‐effectiveness of this technology are still unsatisfactory for practical implementation. This can be primarily attributed to the sluggish kinetics of the anodic oxygen evolution reaction (OER) and the relatively low economic value of cogenerated O2 production. Over the past decades, there are extensive efforts to explore more kinetically favorable photooxidation reactions, which coupled with hydrogen evolution reaction (HER) can simultaneously improve H2 production yield and produce higher valuable alternatives to conventional O2. This review aims to present recent progress on the alternative anodic choices to OER. Here, the fundamental of PEC water splitting and the critical components required for this system are first shortly summarized. Then the benefits and issues of alternative photooxidation reactions including photooxidation of water to hydrogen peroxide, chlorine, alcohol, 5‐hydroxymethylfurfural, or urea oxidation when combined with the concurrent HER, are reviewed and analyzed. This review is concluded by presenting a critical evaluation of the challenges and opportunities of these alternative HER‐coupled photooxidation reactions for solar energy production and environmental treatment.

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“…Además, es utilizada como precursor en la preparación de bloqueadores solares, medicamentos y alimentos. [48] Ácido glicérico Se emplea como precursor para la producción de agentes tensoactivos funcionales y monómeros de oligoésteres y polímeros.…”

Section: Dihidroxiacetonaunclassified

Producción de acetinas (aditivos para combustibles) a partir de glicerol

et al. 2021

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La elevada producción de glicerol, un subproducto de bajo costo proveniente de la industria del biodiésel, ha supuesto una amenaza tanto para el medio ambiente como para la economía. La transformación de glicerol en productos de valor agregado contribuiría positivamente a la economía del biodiésel. En este artículo de revisión se describen las rutas de valorización del glicerol y se presenta la esterificación como una de las más prometedoras para la transformación de glicerol en aditivos para combustibles; igualmente, se describen los resultados más relevantes entre 2010 y 2020 relacionados con las condiciones experimentales (temperatura, relación molar y tiempo de reacción), los catalizadores heterogéneos y la actividad catalítica (en términos de la conversión del glicerol y la selectividad) para la transformación de glicerol en acetinas (monoacetina, diacetina y triacetina). Se espera que esta revisión permita abordar esta técnica de valorización de manera rentable y ambientalmente sostenible.

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Selective production of dihydroxyacetone and glyceraldehyde by photo-assisted oxidation of glycerol

Cited by 20 publications

References 24 publications

Photo-Oxidation of Glycerol Catalyzed by Cu/TiO2

Photo-Oxidation of Glycerol Catalyzed by Cu/TiO2

Alternatives to Water Photooxidation for Photoelectrochemical Solar Energy Conversion and Green H₂ Production

Producción de acetinas (aditivos para combustibles) a partir de glicerol

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Selective production of dihydroxyacetone and glyceraldehyde by photo-assisted oxidation of glycerol

Cited by 20 publications

References 24 publications

Photo-Oxidation of Glycerol Catalyzed by Cu/TiO2

Photo-Oxidation of Glycerol Catalyzed by Cu/TiO2

Alternatives to Water Photooxidation for Photoelectrochemical Solar Energy Conversion and Green H2 Production

Producción de acetinas (aditivos para combustibles) a partir de glicerol

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Product

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Alternatives to Water Photooxidation for Photoelectrochemical Solar Energy Conversion and Green H₂ Production