Selective hydrogenation of nitrobenzene to aniline in dense phase carbon dioxide over Ni/γ-Al2O3: Significance of molecular interactions
スポンサーリンク
概要
- 論文の詳細を見る
The selective hydrogenation of nitrobenzene (NB) over Ni/γ-Al2O3 catalysts was investigated using different media of dense phase CO2, ethanol, and n-hexane. In dense phase CO2, the total rate of NB hydrogenation was larger than that in organic solvents under similar reaction conditions; the selectivity to the desired product, aniline, was almost 100% over the whole conversion range of 0-100%. The phase behavior of the reactant mixture in/under dense phase CO2 was examined at reaction conditions. In situ high-pressure Fourier transform infrared measurements were made to study the molecular interactions of CO2 with the following reactant and reaction intermediates: NB, nitrosobenzene (NSB), and N-phenylhydroxylamine (PHA). Dense phase CO2 strongly interacts with NB, NSB, and PHA, modifying the reactivity of each species and contributing to positive effects on the reaction rate and the selectivity to aniline. A possible reaction pathway for the hydrogenation of NB in/under dense phase CO2 over Ni/γ-Al2O3 is also proposed.
- Elsevier Inc.の論文
- 2009-05-15
著者
関連論文
- Hydrogenation of phenol with supported Rh catalysts in the presence of compressed CO2 : Its effects on reaction rate, product selectivity and catalyst life
- Dealumination of Zeolite Beta Catalyst Under Controlled Conditions for Enhancing its Activity in Acylation and Esterification
- Hydrogen Production by Steam Reforming of Methanol
- Mesoporous smectites incorporated with alkali metal cations as solid base catalysts
- Synthesis of N, N'-Disubstituted Urea from Ethylene Carbonate and Amine Using CaO
- Kinetic Analysis of Hydrogenation of Cinnamaldehyde with a Ruthenium Complex Catalyst in Several Solvents
- Hydroformylation of 1-hexene using polymer-supported rhodium catalysts in supercritical carbon dioxide
- Recyclability of water-soluble ruthenium–phosphine complex catalysts in multiphase selective hydrogenation of cinnamaldehyde using toluene and pressurized carbon dioxide
- A comparative study of supported aqueous- and ethylene glycol-phase catalysts in stilbene hydrogenation: Influence of the different modes of dispersion of supported liquids
- Selective hydrogenation of chloronitrobenzene to chloroaniline in supercritical carbon dioxide over Ni/TiO2: Significance of molecular interactions
- Selective hydrogenation of nitrobenzene to aniline in dense phase carbon dioxide over Ni/γ-Al2O3: Significance of molecular interactions
- The Surface Heterogeneity of Supported Platinum Catalysts as Studied by the Interrupted Temperature-Programmed Desorption of Carbon Monoxide
- An effective medium of H2O and low-pressure CO2 for the selective hydrogenation of aromatic nitro compounds to anilines