Dual layer hollow fibre as main component of methane fuelled solid oxide fuel cell

Solid oxide fuel cell (SOFC) has been regarded as one of the most amazing technologies in energy production that could directly convert hydrocarbon fuel into electricity without reforming procedure. This study was conducted to analyse the micro-tubular solid oxide fuel cell (MT-SOFC) with different...

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Main Author:	Omar, Ahmad Faiq
Format:	Thesis
Language:	English
Published:	2020
Subjects:	TP Chemical technology
Online Access:	http://eprints.utm.my/id/eprint/92038/1/AhmadFaiqMSChE2020.pdf.pdf
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spelling	my-utm-ep.920382021-08-30T04:17:29Z Dual layer hollow fibre as main component of methane fuelled solid oxide fuel cell 2020 Omar, Ahmad Faiq TP Chemical technology Solid oxide fuel cell (SOFC) has been regarded as one of the most amazing technologies in energy production that could directly convert hydrocarbon fuel into electricity without reforming procedure. This study was conducted to analyse the micro-tubular solid oxide fuel cell (MT-SOFC) with different electrolyte thicknesses in terms of its performance by utilising methane (CH4) as the fuel. MT-SOFCs investigated in this work consisted of thin cathode layer, coated onto co-extruded anode/electrolyte dual-layer hollow fibre (DLHF). A DLHFs with different electrolyte thicknesses had been developed in this study by adjusting the extrusion rate upon a single-step phase inversion-based co-extrusion and co-sintering process. Uniform outer electrolyte layer from 18 to 34 µm were achieved when the extrusion rate of outer layer was increased from 1 to 5 ml min-1. The fabricated DLHFs were then cosintered at various temperatures (1350, 1400 and 1450 °C) prior to reduction process at 550 °C for 3 h. In evaluating the performance of DLHFs fuelled by CH4 gas, currentvoltage (I-V) measurement, impedance spectra, as well as stability test were performed at various temperatures ranging from 750 to 850 °C. Although the bending strength and gas-tightness properties were reduced with the decrease in electrolyte layer thickness, significant improvement in power output of the cell was achieved. Power density as high as 0.32 W cm-2 was obtained on the cell with the electrolyte layer of 18 µm in thickness, which is 20 % higher than the cell with an electrolyte layer of 34 µm, which was only 0.12 W cm-2 when operated at 850 °C. Stability test has shown that the cell with thinnest electrolyte (18 µm) can only survived for 8 h while the thickest cell (34 µm) can operate up to 15 h at 750 °C. The results show that there was a significant reduction in cell performance when CH4 was used as the fuel, due to the carbon deposition as proven by Raman spectroscopy and carbon, hydrogen, nitrogen and sulphur (CHNS) analyzer as qualitative and quantitative analyses, respectively. The study also shows that the optimum electrolyte thickness has to be around 23 to 24.5 µm in order to produce a high quality DLHF to withstand carbon deposition. 2020 Thesis http://eprints.utm.my/id/eprint/92038/ http://eprints.utm.my/id/eprint/92038/1/AhmadFaiqMSChE2020.pdf.pdf application/pdf en public http://dms.library.utm.my:8080/vital/access/manager/Repository/vital:139053 masters Universiti Teknologi Malaysia Faculty of Engineering - School of Chemical & Energy Engineering
institution	Universiti Teknologi Malaysia
collection	UTM Institutional Repository
language	English
topic	TP Chemical technology
spellingShingle	TP Chemical technology Omar, Ahmad Faiq Dual layer hollow fibre as main component of methane fuelled solid oxide fuel cell
description	Solid oxide fuel cell (SOFC) has been regarded as one of the most amazing technologies in energy production that could directly convert hydrocarbon fuel into electricity without reforming procedure. This study was conducted to analyse the micro-tubular solid oxide fuel cell (MT-SOFC) with different electrolyte thicknesses in terms of its performance by utilising methane (CH4) as the fuel. MT-SOFCs investigated in this work consisted of thin cathode layer, coated onto co-extruded anode/electrolyte dual-layer hollow fibre (DLHF). A DLHFs with different electrolyte thicknesses had been developed in this study by adjusting the extrusion rate upon a single-step phase inversion-based co-extrusion and co-sintering process. Uniform outer electrolyte layer from 18 to 34 µm were achieved when the extrusion rate of outer layer was increased from 1 to 5 ml min-1. The fabricated DLHFs were then cosintered at various temperatures (1350, 1400 and 1450 °C) prior to reduction process at 550 °C for 3 h. In evaluating the performance of DLHFs fuelled by CH4 gas, currentvoltage (I-V) measurement, impedance spectra, as well as stability test were performed at various temperatures ranging from 750 to 850 °C. Although the bending strength and gas-tightness properties were reduced with the decrease in electrolyte layer thickness, significant improvement in power output of the cell was achieved. Power density as high as 0.32 W cm-2 was obtained on the cell with the electrolyte layer of 18 µm in thickness, which is 20 % higher than the cell with an electrolyte layer of 34 µm, which was only 0.12 W cm-2 when operated at 850 °C. Stability test has shown that the cell with thinnest electrolyte (18 µm) can only survived for 8 h while the thickest cell (34 µm) can operate up to 15 h at 750 °C. The results show that there was a significant reduction in cell performance when CH4 was used as the fuel, due to the carbon deposition as proven by Raman spectroscopy and carbon, hydrogen, nitrogen and sulphur (CHNS) analyzer as qualitative and quantitative analyses, respectively. The study also shows that the optimum electrolyte thickness has to be around 23 to 24.5 µm in order to produce a high quality DLHF to withstand carbon deposition.
format	Thesis
qualification_level	Master's degree
author	Omar, Ahmad Faiq
author_facet	Omar, Ahmad Faiq
author_sort	Omar, Ahmad Faiq
title	Dual layer hollow fibre as main component of methane fuelled solid oxide fuel cell
title_short	Dual layer hollow fibre as main component of methane fuelled solid oxide fuel cell
title_full	Dual layer hollow fibre as main component of methane fuelled solid oxide fuel cell
title_fullStr	Dual layer hollow fibre as main component of methane fuelled solid oxide fuel cell
title_full_unstemmed	Dual layer hollow fibre as main component of methane fuelled solid oxide fuel cell
title_sort	dual layer hollow fibre as main component of methane fuelled solid oxide fuel cell
granting_institution	Universiti Teknologi Malaysia
granting_department	Faculty of Engineering - School of Chemical & Energy Engineering
publishDate	2020
url	http://eprints.utm.my/id/eprint/92038/1/AhmadFaiqMSChE2020.pdf.pdf
_version_	1747818558592647168

Dual layer hollow fibre as main component of methane fuelled solid oxide fuel cell

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