Question

How many phases are in intimate contact at the PEMFC cathode at 120 oC and 1...

How many phases are in intimate contact at the PEMFC cathode at 120 oC and 1 bar?

A) 2

B) 3

C) 4

The answer is B) 3.

Need explanation

Engineering   Chemical-Engineering   
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Homework Answers

Answer #1

PEMFC stands for Proton Exchange Membrane Fuel Cells. In PEMFC electricity is generated in Tripple Phase Boundary region. A Tripple Phase Boundary Region is a region where three different phases are in contact. 3 different phases are Solid (electrolyde), Gas(Gaseous Fuel) & Liquid (Electrolyte). Therefore, 3phases are in intimate contact at PEMFC Cathode.

Additionally, since temperature is 1000C at 1 Bar therefore any water formed in reaction is also in Gasous(vapour) form. Hence we can conclude that 3 phases are in intimate contact at PEMFC Cathode.

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