VTS-ID/8246

Metadaten

Titel	Modeling the direct methanol fuel cell
Autor / Hrsg.	Pofahl, Stefan N.
Dokumentart	Dissertation
Institution	Universität Ulm. Fakultät für Naturwissenschaften
DDC-Sachgruppe	Chemistry & allied sciences (ddc:540)
Schlagwörter (): Schlagwortschema	AspenPlus (custom) Butler-Volmer equation (custom) Crossover (custom) DMFC (custom) Fuel cells (LCSH) Methanol as fuel (LCSH) Methanolzelle (SWD) Mixed potential (custom) Simulation modeling (custom)
Sprache	englisch
Jahr der Erstellung	2011
Signatur	W: W-H 13.126
VTS-Veröffentlichung	07.12.2012
Statistik	73 Zugriffe seit 07.12.2012
Abstract	The Direct Methanol Fuel Cell (DMFC) is simulated in sequential mode in a zero-dimensional model using Butler-Volmer equations to represent the electro-chemical reactions on both electrodes. It is shown that this approach is able to predict the harmful methanol flow across the polymer electrolyte membrane (PEM) - the so called crossover - and the resulting loss of potential on the cathode, caused by the mixed potential that is built between the parasitic cathodic methanol oxidation and the oxygen reduction. A linear model is presented, which explains the deviation between the real anode polarization and the Butler-Volmer equation with the difference in activity of methanol in liquid and vapor phase. The comprehensive model is validated qualitatively and quantitatively with data from literature as well as with measured data.

Anzahl der Teildokumente: 1

Teildokument	Format	Zertifikat / Hash
vts_8246_12079.pdf Dateigröße: 6075 kByte 188 S.	application/pdf	PGP-Signatur: DH/DSS Zertifikat MD5-Hash: f0149ee8cc9226fbb103fe9c3d6bb0f8