Pt and Pt-alloy catalysts and their properties for the liquid-phase hydrogenation of cinnamaldehyde

Koo‐Amornpattana, Wanida; Winterbottom, J. M.

doi:10.1016/s0920-5861(00)00654-4

Cited by 54 publications

(45 citation statements)

References 11 publications

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“…When the H 2 pressure increases 4 times, the reaction rate accelerates about 4 times at the same time. This fact indicates that the reaction order for hydrogen is 1 in the process of cinnamaldehyde hydrogenation, which is in agreement with the result reported in literature [25]. On the other hand, the selectivity to hydrocinnamaldehyde is slightly affected by H 2 pressure.…”

Section: Effect Of the Catalyst Dosagesupporting

confidence: 92%

Preparation of Ni/SiO2 catalyst in ionic liquids for hydrogenation

Fan

Liu

Zheng

et al. 2008

Front. Chem. Eng. China

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A series of silica supported nickel catalysts were prepared from nickel nitrate and tetraethyl orthosilicate by the sol-gel method with the imidazolium type ionic liquids as solvents. The catalysts were characterized by means of X-ray diffraction (XRD), scanning electron microscopy (SEM) and energy dispersive X-ray spectroscopy (EDS). Their catalytic performances for the selective hydrogenation of cinnamaldehyde to hydrocinnamaldehyde were investigated. The results show that the Ni/ SiO 2 catalyst prepared with 1-(2-hydroxyethyl)-3-methylimidazole tetrafluoroborate ionic liquid as solvent exhibits the highest catalytic activity for the reaction. Under the optimal conditions of catalyst dosage (based on the mass of cinnamaldehyde used) 10%, reaction pressure 2 MPa, temperature 373 K and reaction time 2 h, the conversion of cinnamaldehyde and the selectivity to hydrocinnamaldehyde can reach 97.6% and 98.8%, respectively.

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Section: Effect Of the Catalyst Dosagesupporting

confidence: 92%

Preparation of Ni/SiO2 catalyst in ionic liquids for hydrogenation

Fan

Liu

Zheng

et al. 2008

Front. Chem. Eng. China

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“…Relatively high selectivities have, however, been achieved in cinnamaldehyde, citral and furfural hydrogenations. In cinnamaldehyde hydrogenation over Pt on graphite and Pt/SiO 2 catalysts the selectivities to cinnamyl alcohol were 81.5% [85] in toluene/ water mixture at 25 8C and 80% in ethanol. Similarly high selectivity (92%) was obtained over Pt supported on NaY zeolite; the catalyst was prepared by ion-exchange [158].…”

Section: Monometallic Catalystsmentioning

confidence: 99%

Chemoselective hydrogenation of carbonyl compounds over heterogeneous catalysts

Mäki‐Arvela

Hájek

Salmi

et al. 2005

Applied Catalysis A: General

585

478

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“…The activity and selectivity observed over the Pt/SiO2 catalyst in the coated tube reactor was considerably higher than that of monometallic Pt catalysts such as Pt/SiO2 [31], Pt/Ti [35] in the flow reactor and Pt/Graphite and Pt/C [12,23,53,54] in the batch reactors ( Figure 9). The performance of Pt/SiO2 coatings is comparable with that of bimetallic supported catalysts such as Pt-Co/SBA-15 [19].…”

Section: Hydrogenation Of Cal Over the Pt/sio2 Catalysts In Batch Andmentioning

confidence: 97%

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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Pt and Pt-alloy catalysts and their properties for the liquid-phase hydrogenation of cinnamaldehyde

Cited by 54 publications

References 11 publications

Preparation of Ni/SiO2 catalyst in ionic liquids for hydrogenation

Preparation of Ni/SiO2 catalyst in ionic liquids for hydrogenation

Chemoselective hydrogenation of carbonyl compounds over heterogeneous catalysts

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

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