Kinetics of Hydrogenation of Acetic Acid over Supported Platinum Catalyst

Lawal, Ahmed Mashi; Hart, Abarasi; Daly, Helen; Hardacre, Christopher; Wood, Joseph

doi:10.1021/acs.energyfuels.9b01062

Cited by 11 publications

(15 citation statements)

References 48 publications

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“…e hydrogenation of aqueous acetic acid over Pt or Ru based catalysts has been summarized in Table S3. e hydrogenation of acetic acid is reported to be in accordance with the H 2 pressure (Lawal et al, 2019). Because the hydro- gen pressure in our reaction was much lower than that in previous studies, the relatively low catalytic activity for the hydrogenation of aqueous acetic acid was observed over the Pt-NP and SnPt-NP (Sn/Pt=0.32).…”

Section: In Uence Of the Sn X Pt Y Alloy Structure On Thesupporting

confidence: 86%

Effect of SnxPty Alloy Structures in SnPt Bimetallic Nanoparticle Catalysts on Catalytic Activity for Hydrogenation of Acetic Acid

Taniya

Takado

Ito

et al. 2020

J. Chem. Eng. Japan

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This paper reports on monometallic Pt nanoparticle (Pt-NP) and bimetallic SnPt nanoparticle (SnPt-NP) catalysts with di erent Sn x Pt y alloy structures. The catalysts were fabricated using a polyalcohol reduction process, and the catalytic activity of each alloy phase for the hydrogenation of acetic acid to ethanol was investigated. High-resolution transmission electron microscopy (HR-TEM) results con rmed that SnPt-NP catalysts with di erent Sn/Pt atomic ratios can be successfully synthesized by controlling the Sn/Pt atomic ratios of each metal precursor (platinum(II) acetylacetonate and tin(II) acetate) in the starting mixture during a polyalcohol reduction process. Analyses by inductively coupled plasma spectroscopy and X-ray di raction (XRD) indicated the formation of uniform Sn 1 Pt 3 and Sn 1 Pt 1 alloy structures in the SnPt at Sn/Pt atomic ratios of 0.32 and 1.09, respectively. Compared with the monometallic Pt metal phase in the Pt-NP catalysts, the Sn 1 Pt 3 alloy phase markedly accelerated the hydrogenation of acetic acid. However, hydrogenation of acetic acid was not observed over the SnPt-NP catalysts at Sn/Pt 1.09, suggesting that the Sn 1 Pt 1 alloy phase is inactive for the hydrogenation of carboxylic acids to corresponding alcohols. Therefore, we conclude that the Sn 1 Pt 3 alloy phase is the most e ective bimetallic SnPt alloy phase for catalyzing the hydrogenation of carboxylic acids.

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Section: In Uence Of the Sn X Pt Y Alloy Structure On Thesupporting

confidence: 86%

Effect of SnxPty Alloy Structures in SnPt Bimetallic Nanoparticle Catalysts on Catalytic Activity for Hydrogenation of Acetic Acid

Taniya

Takado

Ito

et al. 2020

J. Chem. Eng. Japan

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“…To isolate the contribution of the pre-exponential factor in this catalytic system, we prepared a series of supported Pt catalysts in stages (small Pt particles, <4 nm, were successfully used in other connement strategies 22,23 ). First, a platinum precursor was impregnated on g-Al 2 O 3 using incipient wetness impregnation.…”

Section: Resultsmentioning

confidence: 99%

An experimental approach for controlling confinement effects at catalyst interfaces

et al. 2020

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“…Ethanol (purity 99%), hexane (HPLC grade, 95%), and ethyl acetate (99%) were purchased from Fisher Scientific, UK. 4% Pt/TiO2 was chosen from catalyst screening in our previous study [12]. In addition, the method of catalyst preparation has been acknowledged in the same study [12].…”

Section: Methodsmentioning

confidence: 99%

Optimization of process factors using the Taguchi method of DOE towards the hydrodeoxygenation of acetic acid

Mashi

Rahama

2020

Ovidius University Annals of Chemistry

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This paper reports the optimization of process factors using the Taguchi method towards the conversion of acetic acid and ethanol yield during the hydrogenation of acetic acid over 4% Pt/TiO2. The acidity of 4% Pt/TiO2 was characterized using NH3-Temperature Programmed Desorption analysis (NH3-TPD). Afterwards, the effect of temperature on the hydrogenation of acetic acid as an individual feed was investigated. The reaction space explored in the following ranges: temperature 80-200 °C, pressure 10-40 bar, time 1-4 h, catalyst 0.1-0.4 g and stirring speed 400-1000 min−1 using 4% Pt/TiO2, was investigated for the optimization study, while the effect of temperature was studied in a temperature range of 145 to 200 °C. NH3-TPD analysis reveals that moderate acidity was suitable for the hydrogenation of acetic acid to ethanol. It was also found that 200 °C, 40 bar, 4 h, 0.4 g and 1000 min−1 for acetic acid conversion, and 160 °C, 40 bar, 4 h, 0.4 g and 1000 min−1 were the optimum conditions for ethanol production. In addition, the selectivity of ethanol was favored at lower temperatures which decreases with increasing temperature.

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Kinetics of Hydrogenation of Acetic Acid over Supported Platinum Catalyst

Cited by 11 publications

References 48 publications

Effect of Sn<sub>x</sub>Pt<sub>y</sub> Alloy Structures in SnPt Bimetallic Nanoparticle Catalysts on Catalytic Activity for Hydrogenation of Acetic Acid

Effect of Sn<sub>x</sub>Pt<sub>y</sub> Alloy Structures in SnPt Bimetallic Nanoparticle Catalysts on Catalytic Activity for Hydrogenation of Acetic Acid

An experimental approach for controlling confinement effects at catalyst interfaces

Optimization of process factors using the Taguchi method of DOE towards the hydrodeoxygenation of acetic acid

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