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Artículo

Trickle bed reactors: Effect of liquid flow modulation on catalytic activity

Ayude, María AlejandraIcon ; Cechini, Jorge OmarIcon ; Cassanello Fernandez, Miryam CelesteIcon ; Martinez, Osvaldo MiguelIcon ; Haure, Patricia MonicaIcon
Fecha de publicación: 10/2008
Editorial: Pergamon-Elsevier Science Ltd
Revista: Chemical Engineering Science
ISSN: 0009-2509
Idioma: Inglés
Tipo de recurso: Artículo publicado
Clasificación temática:
Otras Ingeniería Química

Resumen

The effect of slow ON-OFF liquid flow modulation on the oxidation of aqueous solutions of ethanol using a 0.5% Pd / Al2 O3 commercial egg-shell catalyst was investigated in a laboratory trickle bed reactor (TBR). In this mode of operation, the catalyst was cyclically exposed to oxidative and reductive environments. The study was carried out under different gas and liquid flow rates, cycle periods and splits. Cycling results have been compared with the steady-state experiments performed at the corresponding average liquid flow rate. Significant improvements over the continuous operation were obtained when the catalyst was exposed to a short surplus of oxygen (to minimize deactivation by overoxidation in the kinetic regime) after a longer time of working in the mass transfer limited regime. According to the results presented here, it is recommended to work with high liquid flow rates and moderate gas flow rates to ensure complete wetting of the catalyst during the ON cycle and to minimize the overoxidation process during the OFF cycle. © 2008 Elsevier Ltd. All rights reserved.
Palabras clave: Alcohol Oxidation , Catalyst Activation , Catalyst Deactivation , Liquid Flow Modulation , Multiphase Reactors , Stability
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info:eu-repo/semantics/openAccess Excepto donde se diga explícitamente, este item se publica bajo la siguiente descripción: Creative Commons Attribution-NonCommercial-ShareAlike 2.5 Unported (CC BY-NC-SA 2.5)
Identificadores
URI: http://hdl.handle.net/11336/54042
DOI: https://dx.doi.org/10.1016/j.ces.2008.07.024
URL: https://www.sciencedirect.com/science/article/pii/S0009250908004016
Colecciones
Articulos(CINDECA)
Articulos de CENTRO DE INV EN CS.APLICADAS "DR.JORGE J.RONCO"
Articulos(INTEMA)
Articulos de INST.DE INV.EN CIENCIA Y TECNOL.MATERIALES (I)
Articulos(OCA CIUDAD UNIVERSITARIA)
Articulos de OFICINA DE COORDINACION ADMINISTRATIVA CIUDAD UNIVERSITARIA
Citación
Ayude, María Alejandra; Cechini, Jorge Omar; Cassanello Fernandez, Miryam Celeste; Martinez, Osvaldo Miguel; Haure, Patricia Monica; Trickle bed reactors: Effect of liquid flow modulation on catalytic activity; Pergamon-Elsevier Science Ltd; Chemical Engineering Science; 63; 20; 10-2008; 4969-4973
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