In-Situ catalytic surface modification of micro-structured La0.6Sr0.4Co0.2Fe0.8O3-δ (LSCF) Oxygen Permeable Membrane Using Vacuum-Assisted technique

Nur Hidayati Othman*, Munawar Zaman Shahruddin, Ainun Sailah Sihar, Zhentao Wu, K. Li

*Corresponding author for this work

Research output: Contribution to journalConference article

Abstract

This paper aims at investigating the means to carry out in-situ surface modification of La0.6Sr0.4Co0.2Fe0.8O3-δ (LSCF) oxygen permeable membrane by using vacuum assisted technique. The unique structure of the LSCF hollow fibre membrane used in this study, which consists of an outer dense oxygen separation layer and conical-shaped microchannels open at the inner surface has allowed the membrane to be used as oxygen separation membrane and as a structured substrate for where catalyst can be deposited. A catalyst solution of similar material, LSCF was prepared using sol-gel technique. Effects of calcination temperature and heating rate were investigated using XRD and TGA to ensure pure perovskites structure of LSCF was obtained. It was found that a lower calcination temperature can be used to obtain pure perovskite phase if slower heating rate is used. The SEM photograph shows that the distribution of catalyst onto the membrane microchannels using in-situ deposition technique was strongly related to the viscosity of LSCF catalytic sol. Interestingly, it was found that the amount of catalyst deposited using viscous solution was slightly higher than the less viscous sol. This might be due to the difficulty of catalyst sol to infiltrate the membrane and as a result, thicker catalyst layer was observed at the lumen rather than onto the conical-shaped microchannels. Therefore, the viscosity of catalyst solution and calcination process should be precisely controlled to ensure homogeneous catalyst layer deposition. Analysis of the elemental composition will be studied in the future using energy dispersive X-ray Spectroscopy (EDX) to determine the elements deposited onto the membranes. Once the elemental analysis is confirmed, oxygen permeation analysis will be carried out.

Original languageEnglish
Article number05002
JournalMATEC Web of Conferences
Volume69
DOIs
Publication statusPublished - 2 Aug 2016
Event2016 5th International Conference on Chemical and Process Engineering, ICCPE 2016 - Jeju Island, Korea, Republic of
Duration: 23 May 201625 May 2016

Bibliographical note

© The Authors, published by EDP Sciences, 2016. This is an Open Access article distributed under the terms of the Creative Commons Attribution License 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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