Topic
Nitrobenzene
About: Nitrobenzene is a research topic. Over the lifetime, 5285 publications have been published within this topic receiving 83368 citations. The topic is also known as: essence of mirbane & nitrobenzol.
Papers published on a yearly basis
Papers
More filters
TL;DR: Transition metal catalysts such as Pd, Pt, Ru, and Rh supported on carbon, silica and alumina have been examined for the hydrogenation of nitrobenzene (NB) in supercritical carbon dioxide (scCO2) and in ethanol as discussed by the authors.
Abstract: Transition metal catalysts such as Pd, Pt, Ru, and Rh supported on carbon, silica and alumina have been examined for the hydrogenation of nitrobenzene (NB) in supercritical carbon dioxide (scCO2) and in ethanol The order of hydrogenation activity is Pt>Pd>Ru, Rh in scCO2 and in ethanol The effectiveness of the support is C>Al2O3, SiO2 for either Pt or Pd in scCO2 For all the catalysts, higher selectivity to aniline has been obtained in scCO2 compared with ethanol Hydrogenation of nitrobenzene catalyzed with Pd/C and Pt/C catalysts was successfully conducted in scCO2 with a 100% yield to aniline at a lower reaction temperature of 35 °C The product aniline (organic phase) can be easily separated from the side-product water (aqueous phase), solvent (scCO2), and catalyst (solid) by a simple phase separation process The hydrogenation of NB is a structure-sensitive reaction in ethanol as well as in scCO2 except for a few Pt/C catalysts in which the degree of metal dispersion is small (<008)
65 citations
TL;DR: In this paper, the influence of water vapor on the oxidative decomposition of nitrobenzene in a dielectric barrier discharge (DBD) plasma reactor was investigated, where a sintered metal fibers (SMF) sheet modified with MnOx and CoOx has been used as the inner electrode.
65 citations
TL;DR: In this article, the authors used a UV-irradiation reduction method to prepare Ag-reduced graphene oxide (RGO) composite by reducing graphite oxide and silver ion in ethanol.
65 citations
TL;DR: In this article, the catalyst activity was studied for vapor phase hydrogenation of nitrobenzene at atmospheric pressure in the temperature range of 498-598 K, and the particle size before and after the reaction was calculated from XRD data.
Abstract: Pd supported on Mg-Al hydrotalcite with different Pd loadings (0.5, 1, 2 and 5 wt.% of Pd) prepared by impregnation method were characterized by XRD, BET Surface area, CO chemisorption and TPR. The catalyst activity was studied for vapor phase hydrogenation of nitrobenzene at atmospheric pressure in the temperature range of 498–598 K. The metallic dispersion, was obtained by CO chemisorption studies. Pd particle size before and after the reaction was calculated from XRD data. From the TPR studies, it was observed that the negative signal due to the decomposition of PdHx in the low temperature region was absent due to the smaller particle size of the Pd. XRD result also indicate the presence of smaller Pd particle size in low Pd loadings which increases with Pd loading. It was observed that very low concentration of Pd supported on hydrotalcite (0.5 wt.% Pd/HT) is sufficient to get high activity towards the hydrogenation of nitrobenzene to aniline (conversion = 97% and selectivity = 98%) at 498 K. The higher activity of this catalyst was attributed to higher dispersion and lower particle size of Pd as observed from CO chemisorption and XRD results. The particle size of Pd before and after reaction is more or less same indicating that the deactivation is not due to Pd agglomeration but due to the poisoning effect of water generated during the course of the reaction. The reconstruction of hydrotalcite structure in the spent catalysts as evidenced by XRD is indication that water is formed during the reaction.
65 citations
TL;DR: In this paper, Nitrobenzene and benzoic acid are coordinated through water molecules to the more highly polarizing exchangeable cations in the interlayer space of montmorillonite, but are directly coordinated to NH4+ and possibly also K+.
Abstract: Nitrobenzene and benzoic acid are coordinated through water molecules to the more highly polarizing exchangeable cations in the interlayer space of montmorillonite, but are directly coordinated to NH4+ and possibly also K+: On dehydration of the adsorption complexes the nitrobenzene and benzoic acid become directly coordinated to all of the exchangeable cations investigated. Benzoate ion was also formed in amounts which were dependent on the exchangeable cations.
65 citations