Liquid-Phase Hydrogenation of Nitrobenzene in a Tubular Reactor: Parametric Study of the Operating Conditions Influence

• Type: Article in International Scientific Journal
• Date: 2017

Authors

Clara Sá Couto (Author) Other; Luís M. Madeira (Author) FEUP; Paulo Araújo (Author) Other; Clemente Pedro Nunes (Author) Other

Journal

Title: Industrial and Engineering Chemistry Research

Vol. 56 No. 12

Pages: 3231-3242

ISSN: 0888-5885

Indexing

ISI Web of Knowledge - 6 Citations

ISI Web of Science

Scopus - 7 Citations

Associated Projects

LEPABE - Laboratório de Engenharia de Processos, Ambiente, Biotecnologia e Energia

Other information

Authenticus ID: P-00M-MEY

DOI: 10.1021/acs.iecr.7b00403

Abstract (EN): : Fixed-bed reactors for nitrobenzene (NB) hydrogenation into aniline (ANL) in the liquid phase have not experienced extensive industrial-scale development, mostly due to difficulties in removing the reaction heat generated. In this work, NB hydrogenation was performed in a tubular fixed-bed reactor using a Pd/Al2O3 commercial catalyst. The influence of some operating conditions was analyzed by assessing catalyst performance in NB conversion and selectivity toward ANL and secondary products. It was found that catalyst time of usage is extremely importantwhile NB conversion remains stable, selectivity toward the products formed changes (ANL selectivity increases with the catalyst use but the formation of secondary products decreases until almost disappearing). It was also found that temperature and pressure are the most important parameters in the ranges studied and that NH3, which is a reaction product with potential influence in gas composition, does not affect NB conversion but helps decreasing secondary products formation.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 12