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Author(s): Clara Sá Couto
Luís M. Madeira
Paulo Araújo
Clemente Pedro Nunes
Title: Liquid-Phase Hydrogenation of Nitrobenzene in a Tubular Reactor: Parametric Study of the Operating Conditions Influence
Issue Date: 2017
Abstract: : Fixed-bed reactors for nitrobenzene (NB) hydrogenation into aniline (ANL) in the liquid phase have notexperienced extensive industrial-scale development, mostly due todifficulties in removing the reaction heat generated. In this work,NB hydrogenation was performed in a tubular fixed-bed reactorusing a Pd/Al2O3 commercial catalyst. The influence of someoperating conditions was analyzed by assessing catalyst performancein NB conversion and selectivity toward ANL and secondaryproducts. It was found that catalyst time of usage is extremelyimportantwhile NB conversion remains stable, selectivity towardthe products formed changes (ANL selectivity increases with thecatalyst use but the formation of secondary products decreases untilalmost disappearing). It was also found that temperature andpressure are the most important parameters in the ranges studiedand that NH3, which is a reaction product with potential influence in gas composition, does not affect NB conversion but helpsdecreasing secondary products formation.
Related Information: info:eu-repo/grantAgreement/FCT - Fundação para a Ciência e Tecnologia/Projetos Estratégicos/UID/EQU/00511/2013 - POCI-01-0145-FEDER-006939/Laboratório de Engenharia de Processos, Ambiente, Biotecnologia e Energia/LEPABE
Document Type: Artigo em Revista Científica Internacional
Rights: restrictedAccess
Appears in Collections:FEUP - Artigo em Revista Científica Internacional

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