Molecular sieving carbon catalysts for liquid phase reactions: Study of alkene hydrogenation using platinum embedded nanoporous carbon

Holbrook, B.P.; Rajagopalan, Ramakrishnan; Dronvajjala, Krishna; Choudhary, Yogesh Kumar; Foley, Henry C.

doi:10.1016/j.molcata.2012.10.026

Cited by 7 publications

(2 citation statements)

References 19 publications

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“…Although mass-transfer limitations were observed for catalytic liquid-phase conversions, [20][21][22] systematic experimental investigations on how to overcome them are scarce. Recently, Foley et al 23,24 conducted two studies on platinum supported on nanoporous carbon as a catalyst for the liquidphase hydrogenation of different alkenes. Based on a study of the influence of mass-transfer, the catalyst design, i.e., grain size and porosity, was optimized to overcome internal mass-transfer limitations.…”

Section: Introductionmentioning

confidence: 99%

Improving mass-transfer in controlled pore glasses as supports for the platinum-catalyzed aromatics hydrogenation

Goepel

Kabir

Küster

et al. 2015

Catal. Sci. Technol.

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Section: Introductionmentioning

confidence: 99%

Improving mass-transfer in controlled pore glasses as supports for the platinum-catalyzed aromatics hydrogenation

Goepel

Kabir

Küster

et al. 2015

Catal. Sci. Technol.

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“…The pore size is reduced slightly after Pt loading with a distribution ranging from 3 to 4 nm and a maximum around 3.6 nm. The presence of suitable mesopores is beneficial in stabilizing the Pt nanoparticles and improving the internal mass transfer in the coating which improves the COL selectivity [11,37,38]. Figure 2 shows a representative transmission electron microscopy (TEM) image of the Pt/SiO 2 coating.…”

Section: Catalyst Characterizationmentioning

confidence: 99%

Highly Selective Continuous Flow Hydrogenation of Cinnamaldehyde to Cinnamyl Alcohol in a Pt/SiO2 Coated Tube Reactor

et al. 2018

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A novel continuous flow process for selective hydrogenation of α, β-unsaturated aldehyde (cinnamaldehyde, CAL) to the unsaturated alcohol (cinnamyl alcohol, COL) has been reported in a tube reactor coated with a Pt/SiO 2 catalyst. A 90% selectivity towards the unsaturated alcohol was obtained at the aldehyde conversion of 98.8%. This is a six-fold improvement in the selectivity compared to a batch process where acetals were the main reaction products. The increased selectivity in the tube reactor was caused by the suppression of acid sites responsible for the acetal formation after a short period on stream in the continuous process. In a fixed bed reactor, it had a similar acetal suppression phenomenon but showed lower product selectivity of about 47-72% due to mass transfer limitations. A minor change in selectivity and conversion caused by product inhibition was observed during the 110 h on stream with a turnover number (TON) reaching 3000 and an alcohol production throughput of 0.36 kg g Pt −1 day −1 in the single tube reactor. The catalysts performance after eight reaction cycles was fully restored by calcination in air at 400 • C. The tube reactors provide an opportunity for process intensification by increasing the reaction rates by a factor of 2.5 at the reaction temperature of 150 • C compared to 90 • C with no detrimental effects on catalyst stability or product selectivity.

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Platinum embedded within carbon nanospheres for shape selective liquid phase hydrogenation

Peer

Qajar

Holbrook

et al. 2013

Carbon

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Molecular sieving carbon catalysts for liquid phase reactions: Study of alkene hydrogenation using platinum embedded nanoporous carbon

Cited by 7 publications

References 19 publications

Improving mass-transfer in controlled pore glasses as supports for the platinum-catalyzed aromatics hydrogenation

Improving mass-transfer in controlled pore glasses as supports for the platinum-catalyzed aromatics hydrogenation

Highly Selective Continuous Flow Hydrogenation of Cinnamaldehyde to Cinnamyl Alcohol in a Pt/SiO2 Coated Tube Reactor

Platinum embedded within carbon nanospheres for shape selective liquid phase hydrogenation

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