Methanol Fuel Cell Equations

The heart of the direct methanol fuel cell is the proton exchange membrane.

Methanol fuel cell equations.

Empirical model equations proposed for polymer electrolyte fuel cells are used to predict the cell voltage vs. A one dimensional 1 d isothermal model for a direct methanol fuel cell dmfc is presented. In contrast to indirect methanol fuel cells where methanol is reacted to hydrogen by steam reforming dmfcs use a methanol solution usually around 1m i e. O2 4h 4e 2h2o a write an equation for the complete combustion of methanol.

A methanol water solution is introduced to a negatively charged electrode that spontaneously reacts by breaking the methanol molecules apart. The model equations are validated against experimental data for a small scale fuel cell over a wide range of methanol concentration and temperatures. The model cell is comprised of the porous platinum catalyzed electrodes. A new empirical equation is presented which is able to predict.

Diffusion and crossover of methanol are modeled and the mixed potential of the oxygen cathode due to methanol crossover is included. Common operating temperatures are in the range 50 120 c where high temperatures are usually pressurized dmfcs themselves are more efficient at high temperatures and. Whitea acenter for electrochemical engineering department of chemical engineering university of south carolina columbia sc 29208 usa. Pdf on sep 25 2010 rahbar rahimi and others published mathematical modeling of direct methanol fuel cell find read and cite all the research you need on researchgate conference paper pdf.

In the cell at the. Mathematical model of a direct methanol fuel cell brenda l. The membrane phase functions as electrolyte medium and separator between the electrodes. The liquid phase methanol in water is the cell fuel.

The model equations are validated against experimental data for a small scale fuel cell over a wide range of methanol concentration and temperatures. García a vijay a. Empirical model equations proposed for polymer electrolyte fuel cells are used to predict the cell voltage vs. A thin membrane covered on both sides with a sparse layer of platinum based catalyst and sandwiched between two electrodes.

Weidnera 1 roger dougalb and ralph e. About 3 in mass to carry the reactant into the cell. The direct methanol fuel cell dmfc using solid polymer electrolyte membrane is an attractive source of power especially for stationary and mobile applications. Anode electrode of the cell is fed with the fuel and cathode is fed with an oxidant such as oxygen or air.

I wrote ch3oh 1 5o2 co2 2h2o b deduce the half equation for the reaction that takes place at the positive electrode in a methanol fuel cell. Oxygen reacts at the negative electrode of a methanol fuel cell.