Hydrogenation of nitrobenzene over palladium-supported catalysts—Effect of support

Sangeetha, P.; Shanthi, K.; Rao, K. Srinivasa; Viswanathan, B.; Selvam, Parasuraman

doi:10.1016/j.apcata.2008.10.044

Cited by 145 publications

(96 citation statements)

References 21 publications

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“…The deactivation might, therefore, be due to the water released during the NB hydrogenation. A similar observation was reported over 1 % Pd/MgO-Al 2 O 3 catalyst [40]. In our earlier publication, we reported the role of water over Ni/MgO catalyst on the NB hydrogenation activity [11].…”

Section: Effect Of Time On Streamsupporting

confidence: 60%

Nitrobenzene hydrogenation over Ni/TiO2 catalyst in vapour phase at atmospheric pressure: influence of preparation method

et al. 2015

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Highly dispersed nickel nanoparticles on supports such as ZrO 2 and TiO 2 were prepared by reductive deposition method using hydrazine as reducing agent and applied to nitrobenzene hydrogenation. The highlight of this work is to compare the characteristics and activity of these catalysts with the catalysts of the same composition prepared by impregnation method. All the catalysts were characterized by various techniques such as BET, H 2 pulse chemisorption, TEM, XRD (crystalline nature), reduction behaviour (TPR) and state of nickel species (XPS). Ni/ TiO 2 catalyst prepared by reductive deposition method shows excellent conversion of nitrobenzene (99 %) to aniline. This is due to the presence of higher number of surface Ni species than other catalysts as evidenced by H 2 -chemisorption. TPR results reveal the formation of metallic Ni species in the reductive deposition method. XRD results suggest that the all catalytic systems show peaks corresponding to the supports only and not due to the metallic Ni because of its presence in highly dispersed form. The decrease in catalytic performance is observed during the time on stream might be due to coking of the catalyst by the reaction intermediate.

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Section: Effect Of Time On Streamsupporting

confidence: 60%

Nitrobenzene hydrogenation over Ni/TiO2 catalyst in vapour phase at atmospheric pressure: influence of preparation method

et al. 2015

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“…3. A negative peak at 60 • C was observed for the PZ and PC 1.6 Z catalysts owing to the desorption of weakly adsorbed hydrogen and the decomposition of PdH x [23]. Padmasri et al [24] found that PdCl 2 or PdO could be easily reduced to metallic Pd in a hydrogen atmosphere at ambient temperature, allowing the formation of PdH x .…”

Section: Hydrogen Temperature-programmed Reductionmentioning

confidence: 99%

Catalytic behavior and reaction routes of MEK oxidation over Pd/ZSM-5 and Pd–Ce/ZSM-5 catalysts

Yue

Zhang

et al. 2013

Journal of Hazardous Materials

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“…It is commonly used to manufacture amines, which are important intermediates for dyes, urethanes, agro-chemicals and pharmaceuticals [1][2][3], for instance in the synthesis of sildenafil (Viagra) (4), the antibiotic linezolid (Zyvox) and the HIV ptotease inhibitor amprenavir (agenerase). Thus, exploring new catalysts or methods to achieve chemoselective hydrogenation of nitrocompounds has attracted considerable attention [5][6][7][8][9].…”

Section: Introductionmentioning

confidence: 99%

“…If the reaction is performed in liquid phase batch type reactors, usually the reaction temperature for this kind of reactions are in the range 80-120°C, using mainly THF or ethanol as solvent and 10 bar of hydrogen pressure whereas [16,17], in gas phase the reactions are studied at temperature close to 250°C and 1 bar of hydrogen [5][6][7][8]31].…”

Section: Introductionmentioning

confidence: 99%

HYDROGENATION OF NITROBENZENE ON Au/ZrO2 CATALYSTS

Gómez

Torres

Fierro

et al. 2012

J. Chil. Chem. Soc.

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The hydrogenation of nitrobenzene at 298K and pressure of 40 bar of H 2 over zirconia supported Au catalysts has been studied. Three different procedures were used to prepare 1wt% of Au/ZrO 2 catalysts: i) An impregnation method using HAuCl 4 as gold precursor ii)Depositation precipitation of Au nanoparticles generated in the presence of urea and iii) Deposition of Gold nanoparticles generated in presence of cetryltrimethylammonium bromide (CTMABR) as surfactant. The catalysts were characterized by nitrogen adsorption-desorption isotherms at 77 K, XRD, TEM and XPS techniques. The reactions were carried out in a stainless steel batch reactor using ethanol as solvent. The catalysts exhibits a higher selectivity to aniline, with low accumulation of intermediate products. The kinetic study displayed orders 1 respect to hydrogen pressure and to the substrate concentration (nitrobenzene), and the activation energy was 67.2 KJ/mol.

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Hydrogenation of nitrobenzene over palladium-supported catalysts—Effect of support

Cited by 145 publications

References 21 publications

Nitrobenzene hydrogenation over Ni/TiO2 catalyst in vapour phase at atmospheric pressure: influence of preparation method

Nitrobenzene hydrogenation over Ni/TiO2 catalyst in vapour phase at atmospheric pressure: influence of preparation method

Catalytic behavior and reaction routes of MEK oxidation over Pd/ZSM-5 and Pd–Ce/ZSM-5 catalysts

HYDROGENATION OF NITROBENZENE ON Au/ZrO2 CATALYSTS

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