Investigation of the reaction of ethanol-steam mixtures in a YSZ electrochemical reactor operated in a fuel cell mode
Ημερομηνία
2006Λέξη-κλειδί
Επιτομή
In the present investigation ethanol-water mixtures were directly fed to a yttria stabilized zirconia (YSZ) electrochemical reactor operated in a fuel cell mode and the preliminary results are presented and discussed. Polycrystalline films of platinum (Pt) and silver (Ag) were, respectively, tested as anode catalysts in a wide range of experimental conditions while the cathode was exposed to the atmospheric air. The single direct ethanol solid oxide fuel cell (DE-SOFC) tests were performed in order to investigate separately Pt and Ag's activities towards ethanol steam reaction and fuel cell performance (Pt-DESOFC and Ag-DESOFC). In both cases the products were on-line analyzed by a mass spectrograph, a gas chromatograph and a series of gas analysers under fuel cell mode of operation. The results showed that even at high temperature values (>750°C) the main products were CH3CHO, CH4, CO, H2, and CO2. Furthermore, as expected the single DESOFC performance was improved as the temperature increased. However, a relatively poor fuel cell performance has been obtained in both cases, which could be attributed to the following reasons: the relatively low (for YSZ electrolyte) operation temperature, the presence of homogeneous reactions, and the cell configuration. Copyright © 2006 by ASME.
Collections
Related items
Showing items related by title, author, creator and subject.
-
Understanding the electrocatalytic activity of PtxSny in direct ethanol fuel cells
Wang, Y.; Song, S.; Andreadis, G.; Liu, H.; Tsiakaras, P. (2011)In the present work, the activity of PtxSny/C catalysts towards ethanol, acetaldehyde and acetic acid electrooxidation reactions is investigated for each one separately by means of cyclic voltammetry. To this purpose, a ... -
Two-step sequence for synthesis of efficient PtSn@Rh/C catalyst for oxidizing ethanol and intermediate products
Song, S.; He, C.; Liu, J.; Wang, Y.; Brouzgou, A.; Tsiakaras, P. (2012)PtSn@Rh/C-HT catalysts were designed and synthesized by a two-step sequence synthesis: Rh was firstly deposited on the carbon support and then PtSn through microwave assisted polyol method, followed by the heat treatment ... -
Study of the operational parameters effect on a direct ethanol PEM fuel cell performance by the aid on a mathematical model
Andreadis, G.; Tsiakaras, P. (2011)In the present work, a model-based parametric analysis of the performance of a direct ethanol polymer electrolyte membrane fuel cell (DE-PEMFC) is conducted with the purpose to investigate the effect of several parameters ...