화학공학소재연구정보센터
International Journal of Hydrogen Energy, Vol.44, No.58, 30754-30762, 2019
Performance analysis of hollow fibre-based micro-tubular solid oxide fuel cell utilising methane fuel
Solid oxide fuel cell (SOFC) has been studied as one of the most amazing development in energy production that could work directly with hydrocarbon fuel without reforming procedure. This study was conducted to analyse the micro-tubular solid oxide fuel cell (MT-SOFC) in terms of its performance by utilising methane as the fuel, subsequently compared with hydrogen. MT-SOFC that was investigated in this work consisted of thin cathode layer, coated onto co-extruded anode/electrolyte dual-layer hollow fibre (HF); in which its anode was made of nickel (Ni), coupled with cerium-gadolinium oxide (CGO) as an electrolyte, whereas the cathode was lanthanum strontium cobalt ferrite (LSCF) and CGO. The physical analyses carried out were three-point bending test and scanning electron microscopy (SEM). X-ray diffraction (XRD) analysis was further conducted to examine the carbon deposition in HFs. In evaluating the performance of HFs, current-voltage (IV) measurement, as well as impedance analysis of various temperatures range from 500 degrees C to 700 degrees C were performed. Based on the results, the OCV, maximum power density and ohmic ASR of MT-SOFC exposed to methane fuel, were at 0.79 V, 0.22 W cm(-2) and 0.31 Omega cm(2); compared to the other that was exposed to hydrogen fuel, recorded at 0.89 V, 0.67 W cm(-2) and 0.19 Omega cm(2) respectively. This indicates that there was a significant reduction in cell performance when methane was used as the fuel, due to the carbon deposition as proven by SEM, three-point bending and XRD. (C) 2018 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.