Direct Methanol Solid Oxide Fuel Cell

Abstract

In this study, performance of membrane electrode assembly (MEA) was studied with hydrogen and methanol/water vapor fed directly to the anode. MEA was prepared by using scandiastablized zirconia (SSZ) electrolyte and NiO-SSZ and Sr-doped lanthanum ferrite (LSF) as anode and cathode materials. A three dimensional model of solid oxide fuel cell (SOFC) has been developed and is used to predict the temperature and fuel concentration distribution across the cell. On the other hand, we designed special experimental set up for testing MEA performance. The influence of different operation parameters (temperature, fuel concentration, fuel-air flow rate...) to the MEA performance was examined. The results show the maximum power generation from MEA when fed with methanol and hydrogen. The maximum power output of 1.6 W/cm² was obtained at 750 o C with pure hydrogen. When methanol was directly used as fuel, the maximum power output was 1.2 W/cm² at same temperature.

Modeling of Methanol-Fueled SOFC with Anode Offgas Recycling for Simplified System Design

“…The voltage and power density increased with temperature. Kuliyev et al (8) obtained similar results but used equimolar methanol/water mixtures. Liu M. et al, (4) tested injection of direct methanol at lower temperature (550 -650°C) in conjunction with the use of new anode materials that are less prone to carbon deposition.…”

“…At the other end of the cell, we have flow 8 (anode chambers offgas) and 6 (air feeding the cathode chambers). As a result, at the first end of the cell, the theoretical voltage will be: In Equations [8] and [9], we use a temperature of 800°C, i.e. T=1073 K. The oxygen partial pressure in a given total flow i is given by: where, for the given flow i, FO2 refers to the molar flow rate of oxygen (kmol/h) in the flow, Fi is the total molar flow rate, and Pi is the total pressure in the flow (atm).…”

CO2 energy vector in the concept of circular energy

“…The work includes a study on the new concept of using carbon dioxide as an energy vector. This will bring changes and new implications in its capture process, but especially in its storage [11], [12], [13].…”

“…Carbon dioxide can be chemically reduced by an apparently simple solution, by the reaction in the carbon existing in the form of a heated layer (the principle in gasification plants) by the reaction [11], [12], [13]:…”

Room Direct Methanol Solid Oxide Fuel Cell

“…However solid oxide DMFCs had attracted little attention although ceramic electrolytes with proton conductivity are widely known because such electrolytes are developed generally for intermediate temperature SOFC (22). Few latest studies in this field were devoted to DMFC working at elevated temperatures (23,24). These cells revealed no advantages as compared with conventional polymer DMFC.…”