Mass transfer and kinetics of the three-phase hydrogenation of a dinitrile over a Raney-type nickel catalyst

Hoffer, Bram W.; Schoenmakers, P.H.J.; Mooijman, P.R.M; Hamminga, Gerben M.; Berger, Rob J.; Langeveld, A.D. van; Moulijn, Jacob A.

doi:10.1016/s0009-2509(03)00303-8

Cited by 34 publications

(24 citation statements)

References 16 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The Carberry number and correlation of Hoffer et al [42] were employed to ensure that the experiments were carried out in the intrinsic kinetic regime (see Supplementary Material).…”

Section: Model Evaluation: Hdc Of 4-cp With Pd/al 2 O 3 and Pd/ac Catmentioning

confidence: 99%

Deducing kinetic constants for the hydrodechlorination of 4-chlorophenol using high adsorption capacity catalysts

Muñoz

Kaspereit

Etzold

2016

Chemical Engineering Journal

View full text Add to dashboard Cite

Employing high surface area supports for catalytic hydrodechlorination can result in pronounced adsorption of reactants, intermediates and products. The influence of these sorption processes on the activity and selectivity upon 4-chlorophenol (4-CP) hydrodechlorination in aqueous solution has been studied using four commercial Pd/Al2O3 and Pd/AC catalysts at ambient pressure within the temperature range of 20-40°C ([4-CP]0=0.78-2.90mmolL-1, [catalyst]=1gL-1, 50NmLH2min-1). The adsorption capacity of the catalysts was independently evaluated. The Al2O3-based catalyst did not show any significant adsorption of those species whereas the activated carbon materials presented in all cases high uptakes (e.g. up to 2.4mmol4-CPgcat -1). In order to deduce true kinetic constants also for these catalysts, a kinetic model was developed, which accounts for the consecutive reaction and sorption processes in parallel. This expanded model resulted in a reasonable fit, can thus be used for comparison of different catalysts regardless their sorption capacity and allows predicting successfully the selectivity to the reaction productsThe authors gratefully acknowledge the funding of the German Research Council (DFG), which within the framework of its “Excellence Initiative” supports the Cluster of Excellence “Engineering of Advanced Materials” (www.eam.fau.de) at the University of Erlangen-Nurember

show abstract

“…The Carberry number and correlation of Hoffer et al [42] were employed to ensure that the experiments were carried out in the intrinsic kinetic regime (see Supplementary Material).…”

Section: Model Evaluation: Hdc Of 4-cp With Pd/al 2 O 3 and Pd/ac Catmentioning

confidence: 99%

Deducing kinetic constants for the hydrodechlorination of 4-chlorophenol using high adsorption capacity catalysts

Muñoz

Kaspereit

Etzold

2016

Chemical Engineering Journal

View full text Add to dashboard Cite

show abstract

“…The gas-liquid mass transfer coefficient is usually determined using the dynamic physical absorption method. 2,3,7,8 Cordova and Harriott 9 and Gholap et al 10 calculated gas-liquid mass transfer coefficient and the liquid-solid mass transfer coefficient by changing catalyst loading and using different size of catalyst particle under reaction conditions. The drawback of varying catalyst size is the requirement of shell type catalyst to ensure interparticle diffusion does not depend on catalyst size.…”

Section: Introductionmentioning

confidence: 99%

Determination of mass transfer resistances of fast reactions in three‐phase mechanically agitated slurry reactors

Stamatiou

Muller

2016

AIChE Journal

View full text Add to dashboard Cite

A methodology for the determination of mass transfer resistances of fast reactions in three-phase mechanically agitated slurry reactors under the reaction conditions is presented. The mass transfer resistances affect significantly the overall mass transfer rate, the design equation and consequently the scale up of the reactor. There is not established methodology to separate the mass transfer resistances under reaction conditions by changing catalyst loading and manipulating the process variables, pressure and agitation speed. This allows to avoid the use of different catalyst particles and give the chance to calculate the mass transfer resistances without caring about the type of catalyst. We calculate each mass transfer resistance under conditions which do not allow to neglect any of the resistances. It is shown that the level off of mass transfer rate which is developed in the plot of mass transfer rate against agitation speed plots is not enough to determine the limiting regime. The hydrogenation of styrene over Pd/C (5% catalyst content) is used as case study to demonstrate the methodology.

show abstract

“…Also, the laboratory semi-batch reactor or www.elsevier.com/locate/cattod Catalysis Today 125 (2007) [64][65][66][67][68][69][70][71][72][73] slurry reactor is often used as a tool to provide intrinsic kinetic data, which is used for the design of the large-scale catalytic reactors, and for better understanding of catalytic reaction mechanisms. Several examples of catalytic hydrogenation kinetic studies in batch reactors have been published previously from catalysis and reaction engineering viewpoint [7][8][9]. However, the kinetic studies for fast hydrogenation reactions are difficult to conduct in a batch reactor even at the highest stirrer speed.…”

Section: Introductionmentioning

confidence: 99%

Comparison of performance of microreactor and semi-batch reactor for catalytic hydrogenation of o-nitroanisole

2007

View full text Add to dashboard Cite

Mass transfer and kinetics of the three-phase hydrogenation of a dinitrile over a Raney-type nickel catalyst

Cited by 34 publications

References 16 publications

Deducing kinetic constants for the hydrodechlorination of 4-chlorophenol using high adsorption capacity catalysts

Deducing kinetic constants for the hydrodechlorination of 4-chlorophenol using high adsorption capacity catalysts

Determination of mass transfer resistances of fast reactions in three‐phase mechanically agitated slurry reactors

Comparison of performance of microreactor and semi-batch reactor for catalytic hydrogenation of o-nitroanisole

Contact Info

Product

Resources

About