Influence of preparation method and palladium content on Pd/C catalysts activity in the liquid phase hydrogenation of nitrobenzene to aniline

Turáková, Mária; Králik, Milan; Lehocký, Peter; Pikna, Ľubomír; Smrčová, Miroslava; Remeteiová, Dagmar; Hudák, Alexander

doi:10.1016/j.apcata.2014.02.025

Cited by 53 publications

(29 citation statements)

References 29 publications

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“…The decrease in a specific surface area S A (M), especially in surface area of micropores that constitute majority of catalyst surface, has been observed. We can declare that palladium crystallites fill the pores and thus cause decrease in catalyst surface area according to reference [33].…”

Section: Support and Catalyst Propertiesmentioning

confidence: 99%

“…A more detailed analysis of its properties with SEM and TEM images as well as with XRD patterns was published previously [33].…”

Section: Support and Catalyst Propertiesmentioning

confidence: 99%

“…3%Pd/C catalyst was prepared using a simple precipitation-deposition-reduction method described in detail in the previous paper [33]. PdCl 2 as a palladium precursor was used.…”

Section: Catalyst Preparationmentioning

confidence: 99%

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Liquid phase hydrogenation of nitrobenzene

Turáková

Salmi

Eränen

et al. 2015

Applied Catalysis A: General

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Section: Support and Catalyst Propertiesmentioning

confidence: 99%

“…A more detailed analysis of its properties with SEM and TEM images as well as with XRD patterns was published previously [33].…”

Section: Support and Catalyst Propertiesmentioning

confidence: 99%

See 1 more Smart Citation

Liquid phase hydrogenation of nitrobenzene

Turáková

Salmi

Eränen

et al. 2015

Applied Catalysis A: General

Self Cite

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“…The common industrial method for aniline production is through catalytic hydrogenation of nitrobenzene [1,2]. In the process, carbon supported noble metal catalysts are widely used [2][3][4][5][6][7][8][9][10]. However, improvement of the catalyst is limited by some obstacles.…”

Section: Introductionmentioning

confidence: 99%

Synthesis of mesoporous γ-Fe2O3 supported palladium nanoparticles and investigation of their roles as magnetically recyclable catalysts for nitrobenzene hydrogenation

Jiang

Jafari

et al. 2015

Applied Catalysis A: General

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a b s t r a c tThe mesoporous ␥-Fe 2 O 3 (maghemite) supported palladium catalysts (written as Pd/meso-␥-Fe 2 O 3 ) are synthesized using impregnation and one-step sol-gel methods and characterized by PXRD, BET, TEM, EDX, and XPS. The synthesized Pd/meso-␥-Fe 2 O 3 catalysts are applied in nitrobenzene hydrogenation reactions under 50 • C and 1 atm and their catalytic activities are compared with Pd/comm-Fe 2 O 3 , Pd/meso-SiO 2 , and Pd/meso-C catalysts, in order to study the effect of the catalyst support. The TOF number of a 1% Pd/meso-␥-Fe 2 O 3 -im catalyst is highest among all the synthesized catalysts, attributed to the well dispersed Pd nanoparticles on the iron oxide support of large surface area, large pore size, and an interconnected network. All the mesoporous ␥-Fe 2 O 3 nanoparticle catalysts show characteristics of superparamagnetic behavior and thus can be easily retrieved by an external magnetic field. Significant catalyst activity decay is observed with 1% Pd/meso-␥-Fe 2 O 3 -im catalyst due to Pd leaching. However, improvement in activity of the recycled catalyst is observed when the one-step sol-gel synthesis method is used.

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“…[4] Moreover nitration of aromatic compounds is a very well established and optimised technology that makes nitroarenes a readily available feedstock for the production of bulk and/or fine chemicals. [5,6] Solvents, such as ethanol, [1,[7][8][9][10][11][12] methanol, [13] 2-propanol, [14] have been used to facilitate heat and mass transfer during liquid-phase reaction conditions. However, after the end of the reaction additional separation steps are always employed to separate the product, resulting in not only high cost and energy input but also higher E-factor of this process.…”

Section: Introductionmentioning

confidence: 99%

Supported Bimetallic AuPd Nanoparticles as Catalyst for the Solvent-Free Selective Hydrogenation of Nitroarenes

Qu¹,

Macino²,

Iqbal³

et al. 2018

Preprint

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Abstract:Selective hydrogenation of nitrobenzene was carried out under solvent-free conditions using supported AuPd nanoparticles catalyst, prepared by modified impregnation method (M Im ), as efficient catalyst. >99% yield of aniline (AN) was obtained after 15 hours at 90 °C, 3 bar H 2 that can be used without any further purification or separation, therefore reducing cost and energy input. Supported AuPd nanoparticles catalyst, prepared by M Im , was found to be active and stable even after 4 recycle experiments whereas the same catalyst prepared by S Im deactivated during the recycle experiments.The most effective catalyst was tested for the chemoselective hydrogenation of 4-chloronitrobenzene (CNB) to 4-chloroaniline (CAN). The activation energy of CNB to CAN was found to be 25 kJ mol -1 , while that of CNB to AN was found to be 31 kJ mol -1 . Based on this, the yield of CAN was maximized (92%) by lowering the reaction temperature to 25 °C.

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Influence of preparation method and palladium content on Pd/C catalysts activity in the liquid phase hydrogenation of nitrobenzene to aniline

Cited by 53 publications

References 29 publications

Liquid phase hydrogenation of nitrobenzene

Liquid phase hydrogenation of nitrobenzene

Synthesis of mesoporous γ-Fe2O3 supported palladium nanoparticles and investigation of their roles as magnetically recyclable catalysts for nitrobenzene hydrogenation

Supported Bimetallic AuPd Nanoparticles as Catalyst for the Solvent-Free Selective Hydrogenation of Nitroarenes

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