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Quinta do Anjo, Portugal

An electrodes/electrolyte assemblyMEA, electrochemical membrane reactoris described and a method for the direct amination of hydrocarbons, namely for the direct amination of benzene to aniline, and a method for the preparation of said electrodes/electrolyte assembly. The presented Solution allows the increase of conversion of said amination to above 60%, even at low temperatures, i.e., between 200 C. and 450 C.; preferably between 300 C. and 400 C. The electrodes/electrolyte assembly for direct amination of hydrocarbons comprises: an anode (

Couto C.S.,CUF Quimicos Industriais S.A. | Madeira L.M.,University of Porto | Nunes C.P.,University of Lisbon | Araujo P.,CUF Quimicos Industriais S.A.
Chemical Engineering and Technology | Year: 2015

The catalytic hydrogenation of nitrobenzene (NB) was studied in a three-phase basket reactor with a commercial Pd/Al2O3 sample as catalyst. The kinetic experiments allowed a better understanding of the mechanism behind the formation of aniline (ANL) and by-products, a topic not yet well comprehended. The effect of some operating conditions was studied and the existence of more by-products than mentioned in the literature was stated; specifically, benzene formation was verified. Both the reaction kinetics and selectivity were found to be strongly dependent on the temperature, while the effect of total pressure is not that pronounced. Moreover, the high selectivity of the catalyst used in the present work was proved, and as such the deep hydrogenation of ANL to form by-products only occurs in considerable extension when the NB concentration in the reaction mixture becomes negligible. © 2015 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim. Source

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