The selective hydrogenation of butyne-1,4-diol by supported palladiums: a comparative study on slurry, fixed bed, and monolith downflow bubble column reactors

Marwan, H.; Winterbottom, J. M.

doi:10.1016/j.cattod.2004.07.003

Cited by 17 publications

(13 citation statements)

References 11 publications

(14 reference statements)

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“…Monolithic catalysts have been studied for multiphase catalytic applications, including hydrogenation reactions . Considering that many of these reactions are limited by mass‐transfer resistance phenomena, the excellent characteristics of monoliths associated with mass transport are of great relevance.…”

Section: Introductionmentioning

confidence: 99%

Mathematical modeling of the partial hydrogenation of vegetable oil in a monolithic stirrer reactor

2014

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Experimental and theoretical studies on the partial hydrogenation of vegetable oil in a monolithic stirrer reactor are reported. A complete mathematical model of the reactor was developed, including hydrogenation and isomerization kinetics, catalyst deactivation, external gas-liquid and liquid-solid as well as internal mass transfer. The experimental studies were carried out in a Pd/Al 2 O 3 /Al monolithic stirrer reactor, at a wide range of temperatures (353-373 K), pressures (414-552 kPa), and catalyst loadings (0.00084-0.00527 kg Pd,exp m 23 ). Based on this model, simulated data can be used to evaluate the catalyst (Pd/Al 2 O 3 /Al) and the hydrogenation process in consecutive catalytic tests under different operating conditions.

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Section: Introductionmentioning

confidence: 99%

Mathematical modeling of the partial hydrogenation of vegetable oil in a monolithic stirrer reactor

2014

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“…Di(1,3-dioxepan-2-yl)ethyne (5) The general procedure of the galvanostatic preparative electrolysis was as follows: butynediol 1 (50 mmol, 4.3 g) was dissolved in dried THF (200 ml), which contained Bu 4 NBF 4 (100 mmol, 33 g). This electrolyte was stirred in undivided cell at 0-1°C.…”

Section: Methodsmentioning

confidence: 99%

Electrochemical Oxidation of But-2-yne-1,4-diol

Hlavatý

Štícha

2006

Collect. Czech. Chem. Commun.

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But-2-yne-1,4-diol (1) was electrochemically oxidized on glassy carbon anode in a dry THF solution containing a quaternary ammonium salt, in an undivided cell giving di(1,3-dioxepan-2-yl)ethyne (5) in 80% yield. The electrochemically generated dialdehyde intermediate is assumedly acetalized in a fast reaction with THF. Dimerized product 6 was isolated in 85% yield after electrooxidation of diol 1 in dry 1,2-dimethoxyethane under similar conditions.

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“…Roy et al 8 summarized the previous studies in this field and discussed the open points including a comparison of the different operation modes. In spite of the fact that this comparison is not straightforward since the morphology of the catalysts is influenced by their preparation – e.g., the pore structure depends on the pressing or binders for pellets and monoliths, respectively – it has been shown that the catalytic performance, especially the reactor productivity, can be improved compared to slurry or trickle beds 9–12. However, also lower performance has been reported.…”

Section: Introductionmentioning

confidence: 99%

Structured Raney Nickel Catalysts for Liquid‐Phase Hydrogenation

2016

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Structured catalysts consisting of metal sheets on which Raney Ni was deposited by the thermal spraying method were tested for the liquid-phase hydrogenation of glucose to sorbitol and 2-nitrotoluene to 2-methylaniline, used as model reactions. Catalytic tests performed in a bench-scale (1 L) reactor have shown that catalytic activity of Raney Ni sheets is significantly higher than the one of the pellets used for fixed-bed applications but lower than the activity of the powder catalyst used in slurry mode. The activity could be significantly improved when applying a two-phase co-current flow through a monolith. In this case the activity was superior to the one obtained with the slurry catalyst. These results confirm the potential of Raney Ni monoliths as structured catalysts.

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The selective hydrogenation of butyne-1,4-diol by supported palladiums: a comparative study on slurry, fixed bed, and monolith downflow bubble column reactors

Cited by 17 publications

References 11 publications

Mathematical modeling of the partial hydrogenation of vegetable oil in a monolithic stirrer reactor

Mathematical modeling of the partial hydrogenation of vegetable oil in a monolithic stirrer reactor

Electrochemical Oxidation of But-2-yne-1,4-diol

Structured Raney Nickel Catalysts for Liquid‐Phase Hydrogenation

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