CO2 role on the glycerol conversion over catalyst containing CaO-SiO2 doped with Ag and Pt

Costa, Jessé C.; Santos, R. C. R.; Coutinho, Lucas Pinheiro; Silva, Oderlando R.; Barros, Helenilson O.; Freire, V. N.; Valentini, Antoninho

doi:10.1016/j.cattod.2019.02.009

Cited by 10 publications

(6 citation statements)

References 74 publications

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“…By rough estimation, the particle size of Au NPs is below 5 nm; nevertheless, some Au NP aggregation was observed in each catalyst (Fig. 3(a−c)) 27‐29 …”

Section: Resultsmentioning

confidence: 99%

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The support influence of Au‐based catalysts in glycerin selective oxidation to glyceric acid

Shen

Chen

et al. 2022

J of Chemical Tech & Biotech

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Background The sustainable conversion of biomass‐derived glycerin into high‐value‐added chemicals is a significant challenge in contemporary science. In this context, the selective oxidation of aqueous glycerin into glyceric acid was investigated in the presence of NaOH and atmospheric oxygen. It was demonstrated that the selective transformation of glycerin to glyceric acid involves a new chemical reaction path for commodity glyceric acid that is both abundant and economical. Results The hydrotalcite‐supported Au nanoparticle catalyst (5%Au/HT) was found to be the most active for glycerin selective transformation to glyceric acid, showing 89.5% glycerin conversion with 61.2% glyceric acid selectivity under optimum experimental conditions. Furthermore, the 5%Au/HT catalyst was reused six times and maintained nearly the same activity in the catalytic recycle experiments. Conclusion In the Au‐based catalysts, there are strong electronic interactions between the different supports and Au nanoparticles (Au NPs). Besides, the basic sites of the catalysts participated in promotion of hydroxyl functional groups. © 2022 Society of Chemical Industry (SCI).

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“…By rough estimation, the particle size of Au NPs is below 5 nm; nevertheless, some Au NP aggregation was observed in each catalyst (Fig. 3(a−c)) 27‐29 …”

Section: Resultsmentioning

confidence: 99%

“…3(a−c)). [27][28][29] XPS spectra of Au 4f in fresh and spent 5% Au/HT, 5% Au/HAP, and 5% Au/CuO catalysts are shown in Fig. 4.…”

Section: Resultsmentioning

confidence: 99%

The support influence of Au‐based catalysts in glycerin selective oxidation to glyceric acid

Shen

Chen

et al. 2022

J of Chemical Tech & Biotech

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“…The nanofold structure of LDH, characterized by a large surface area, promotes an augmentation in the concentration of active sites and accessible sites. Consequently, it facilitates the diffusion of reaction substrates and products throughout the catalyst 29,30 …”

Section: Resultsmentioning

confidence: 99%

“…Consequently, it facilitates the diffusion of reaction substrates and products throughout the catalyst. 29,30 The N 2 adsorption-desorption isotherm and pore size distribution of the fresh catalyst are shown in Fig. 2(c) and Supporting Information Fig.…”

Section: Morphology and Structure Of Catalystsmentioning

confidence: 99%

Selective conversion of glycerin to glyceric acid under mild and base‐free conditions using layered double hydroxides‐supported Pt nanoparticle catalysts

Chen,

Shen,

Yin

2023

J of Chemical Tech & Biotech

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BackgroundGlyceric acid (GLA) has immense potential as a versatile compound with significant biological activity in the field of life sciences. Its production from glycerin (GLY) through selective aerobic oxidation offers an attractive route for sourcing chemicals from biomass. However, achieving high yields of GLA under mild conditions, specifically base‐free and low‐temperature conditions, presents a notable challenge.ResultsIn this study, we present the remarkable catalytic performance of Pt nanoparticles (NPs) supported on cerium‐doped layered double hydroxides (LDHs), yielding an impressive GLA selectivity of 60.3% at 60 oC. Our findings indicate that the Ce‐doped catalyst greatly enhancing catalyst alkalinity and catalytic performance, particularly at low temperatures. The cyclic performance of Pt/1%CeMg1Al1‐LDH revealed a gradual decline in catalytic performance after 5 cycles, indicating the catalyst's inherent resistance to deactivation.ConclusionThe construction of CeO2 and the increase of catalyst alkalinity after Ce doping may be the main reasons for improving the catalytic performance. The mild and base‐free reaction conditions represent a pivotal step toward the future industrialization of glyceric acid, considering their divergence from the conventional glycerin conversion conditions.This article is protected by copyright. All rights reserved.

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“…A tuneable acidity can be generated through support synthesis methodologies that induce oxygen vacancies in the material, and these have been studied in different works concerning the influence of the support in the reaction [114]. Among them, materials such as carbon [115][116][117], metal oxides [118][119][120][121][122][123][124][125], zeolites [116,[126][127][128][129][130][131], and mixed oxides [120,[132][133][134][135] that exhibited high acidity were applied, in order to benefit the dehydration step [120,128,136]. In these cases, selectivity to 1,2-PDO can be explained if glycerol adsorption over support acid sites controlled by a steric effect is considered.…”

Section: Hydrogenolysis and Reduction Processesmentioning

confidence: 99%

Recent Advances in Glycerol Catalytic Valorization: A Review

et al. 2020

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Once a biorefinery is ready to operate, the main processed materials need to be completely evaluated in terms of many different factors, including disposal regulations, technological limitations of installation, the market, and other societal considerations. In biorefinery, glycerol is the main by-product, representing around 10% of biodiesel production. In the last few decades, the large-scale production of biodiesel and glycerol has promoted research on a wide range of strategies in an attempt to valorize this by-product, with its transformation into added value chemicals being the strategy that exhibits the most promising route. Among them, C3 compounds obtained from routes such as hydrogenation, oxidation, esterification, etc. represent an alternative to petroleum-based routes for chemicals such as acrolein, propanediols, or carboxylic acids of interest for the polymer industry. Another widely studied and developed strategy includes processes such as reforming or pyrolysis for energy, clean fuels, and materials such as activated carbon. This review covers recent advances in catalysts used in the most promising strategies considering both chemicals and energy or fuel obtention. Due to the large variety in biorefinery industries, several potential emergent valorization routes are briefly summarized.

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CO2 role on the glycerol conversion over catalyst containing CaO-SiO2 doped with Ag and Pt

Cited by 10 publications

References 74 publications

The support influence of Au‐based catalysts in glycerin selective oxidation to glyceric acid

The support influence of Au‐based catalysts in glycerin selective oxidation to glyceric acid

Selective conversion of glycerin to glyceric acid under mild and base‐free conditions using layered double hydroxides‐supported Pt nanoparticle catalysts

Recent Advances in Glycerol Catalytic Valorization: A Review

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