Acetalization of glycerol with acetone over UAV-59 catalyst: Mild reaction conditions and enhanced selectivity

Santos-Vieira, Isabel; Mendes, Ricardo F.; Paz, Filipe A. Almeida; Rocha, João; Simões, Mário M. Q.

doi:10.1016/j.cattod.2023.114296

Cited by 3 publications

(6 citation statements)

References 48 publications

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“…Such as been previously speculated, and a proposed mechanism can be seen in Figure 7, in this case specifically for a Brönsted acid catalyst [18]. In general, the reaction is kickstarted when the catalyst interacts with the carbonyl of the substrate, either by protonation or coordination with a metal site (for Brönsted and Lewis acids, respectively) [35,41,42,55]. This interaction forms a protonated intermediate structure that, when interacting with the hydroxyl groups in glycerol, originates a hemiketal/hemicetal.…”

Section: Catalystmentioning

confidence: 53%

“…Catalyst recycling was evaluated for ten consecutive cycles, with MOF-808 (Hf) demonstrating high stability [35]. Santos-Vieira et al reported the preparation of a coordination polymer (UAV-59), constituted by Gd 3+ cations and nitrilo(trimethylphosphonic acid) [55]. This catalyst was applied to acetalization reactions, at 55 °C, obtaining a glycerol conversion of 94%, with simultaneous high solketal selectivity (97%).…”

Section: Heterogeneous Catalysts For Glycerol Conversionmentioning

confidence: 99%

“…The efficiency of this polymer can be explained due to the high concentration of acidic protons in its structure. Catalyst stability studies demonstrated only a minor decrease in activity, after four consecutive recycling cycles [55]. The best catalytic performance between the based materials present in Table 3, is showed by a composite formed by the incorporation of a polyoxotungstate into the MOF-Fe framework [HMIm]3[PW12O40]@MOF-Fe (Table 3) [70].…”

Section: Heterogeneous Catalysts For Glycerol Conversionmentioning

confidence: 99%

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The Role of the Heterogeneous Catalyst to Produce Solketal from Biodiesel Waste: The Key to Achieve Efficiency

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et al. 2024

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The valorization of the large amount of crude glycerol formed from biodiesel industry, is of primordial necessity. One possible direction with high interest to the biorefiniery sector is the production of fuel additives as solketal, though the acetalization of glycerol with acetone. This is a chemical process that conciliates high sustainability and economic interest, since solketal contributes to the fullfilment of a Circular Economy Model through its use in biodiesel blends. The key to guarantee high efficiency and high sustainability for solketal production is the use of a recovery and recyclable heterogeneous catalyst. Some examples are already reported in the literature (first example in 2012), and this review intends to conciliate the information spreaded in this topic and established the most important reacional parameters and the main catalytic characteristics strategies to achieve high solketal production in short reaction time.

show abstract

Section: Catalystmentioning

confidence: 53%

Section: Heterogeneous Catalysts For Glycerol Conversionmentioning

confidence: 99%

Section: Heterogeneous Catalysts For Glycerol Conversionmentioning

confidence: 99%

See 1 more Smart Citation

The Role of the Heterogeneous Catalyst to Produce Solketal from Biodiesel Waste: The Key to Achieve Efficiency

Dias,

Viana,

Cunha-Silva

et al. 2024

Preprint

View full text Add to dashboard Cite

show abstract

“…According to previous speculation, a proposed mechanism can be seen in Figure 7, in this case specifically for a Brönsted acid catalyst [19]. In general, the reaction is kickstarted when the catalyst interacts with the carbonyl of the substrate, either by protonation or coordination with a metal site (for Brönsted and Lewis acids, respectively) [40,46,47,60]. This interaction forms a protonated intermediate structure that, when interacting with the hydroxyl groups in glycerol, originates a hemiketal/hemiacetal.…”

Section: Catalystmentioning

confidence: 81%

“…Catalyst recycling was evaluated for ten consecutive cycles, with MOF-808 (Hf) demonstrating high stability [40]. Santos-Vieira et al reported the preparation of a coordination polymer (UAV-59), constituted by Gd 3+ cations and nitrile (trimethylphosphonic acid) [60]. This catalyst was applied to acetalization reactions, at 55 • C, obtaining a glycerol conversion of 94%, with simultaneous high solketal selectivity (97%).…”

Section: Heterogeneous Catalysts For Glycerol Acetalizationmentioning

confidence: 99%

The Role of the Heterogeneous Catalyst to Produce Solketal from Biodiesel Waste: The Key to Achieve Efficiency

Dias,

Viana,

Cunha-Silva

et al. 2024

Nanomaterials

View full text Add to dashboard Cite

The valorization of the large amount of crude glycerol formed from the biodiesel industry is of primordial necessity. One possible direction with high interest to the biorefinery sector is the production of fuel additives such as solketal, through the acetalization of glycerol with acetone. This is a chemical process that conciliates high sustainability and economic interest, since solketal contributes to the fulfillment of a Circular Economy Model through its use in biodiesel blends. The key to guarantee high efficiency and high sustainability for solketal production is the use of recovery and recyclable heterogeneous catalysts. Reported works indicate that high yields are attributed to catalyst acidity, mainly the ones containing Brönsted acidic sites. On the other hand, the catalyst stability and its recycling capacity are completely dependent of the support material and the acidic sites incorporation methodology. This review intends to conciliate the information spread on this topic and indicate the most assertive strategies to achieve high solketal production in short reaction time during various reaction cycles.

show abstract

Biochar carbon nanodots for catalytic acetalization of biodiesel by-product crude glycerol to solketal: process optimization by RSM and life cycle cost analysis

Ao,

Gouda,

Saikia

et al. 2024

Sci Rep

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Acetalization of glycerol with acetone over UAV-59 catalyst: Mild reaction conditions and enhanced selectivity

Cited by 3 publications

References 48 publications

The Role of the Heterogeneous Catalyst to Produce Solketal from Biodiesel Waste: The Key to Achieve Efficiency

The Role of the Heterogeneous Catalyst to Produce Solketal from Biodiesel Waste: The Key to Achieve Efficiency

The Role of the Heterogeneous Catalyst to Produce Solketal from Biodiesel Waste: The Key to Achieve Efficiency

Biochar carbon nanodots for catalytic acetalization of biodiesel by-product crude glycerol to solketal: process optimization by RSM and life cycle cost analysis

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