New catalytic reactors prepared from symmetric and asymmetric ceramic hollow fibres

Authors: F.R. García-García, K. Li

Abstract:
In this study, asymmetric and symmetric Al₂O₃ hollow fibres were employed as a support of a 10% CuO/CeO₂ catalyst in the development of an asymmetric hollow fibre reactor (AHFR) and a symmetric hollow fibre reactor (SHFR), respectively. The 10% CuO/CeO₂ catalyst was successfully deposited in both Al₂O₃ hollow fibre substrates by the sol–gel Pechini method. The impregnated fibres were characterized by Ar permeability, Hg porosimetry, X-ray diffraction, scanning electron microscopy (SEM), transmission electron microscopy (TEM) and high-resolution optical microscopy. The water gas shift (WGS) reaction was chosen as a sample reaction to compare the performances of both AHFR and SHFR with a traditional fixed bed reactor (FBR). The catalytic activity tests in the FBR were carried out using the powder ground from either the asymmetric or symmetric Al₂O₃ hollow fibre impregnated with 10% CuO/CeO₂. Two different configurations, “dead-end” and “open-end”, were studied in the AHFR and SHFR. The experimental results show that, despite the differences observed between the AHFR and SHFR, both reactors offer important advantages over conventional FBRs including high catalytic activity along with a better selectivity.

Keywords:
Al₂O₃ hollow fibres
Asymmetric
Symmetric
Catalyst
Flow-through operation

Published in: Applied catalysis A: General  (Volume 456, Pages 1-248, 10 April 2013)

Publisher: Elsevier

ISSN Information: 0926-860X

New catalytic reactors prepared from symmetric and asymmetric ceramic hollow fibres

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