NE315 Fuel Cells Reactions and Applications Paper


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NE 315 Energy Systems and Resources Homework #9 Prepare a report assessing the feasibility of using fuel cells for various applications. In this report be sure to include the following items in your discussion: 1. The chemical reaction (anode and cathode) steps for the following fuel cell types: A. AFC B. PAFC C. MCSFC D. SOFC E. PEMFC F. DMFC 2. The most probable applications and/or uses of the above listed fuel cell types in the future. Here, be sure to give your reasons as logical arguments. 3. Choose the one fuel cell type you believe will potentially be the most applicable (best choice) for future use in vehicles. Present the most important factors/problems that must be addressed/solved for the selected fuel cell type to be economically and technologically viable/applicable for this purpose. Β© 1995, 2016 ...
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Energy Systems and Resources

Currently, global energy demand is high and is increasing by 1.8% per year. Added to this
fact is that the use of clean energy with very low emissions of greenhouse gases is
increasingly required. Fuel cells are shown in the future as a possibility for the supply of
electricity because they can convert chemical energy directly into electricity without
affecting the environment and with efficiency levels above 60%. This characteristic places
it at an advantage over combustion machines, since the latter require a four-stage process
for the generation of electricity to occur: i) burning of fuel to generate heat, ii) generation
of water vapor, iii) generation of mechanical energy in a turbine, and iv) production of

Fuel cells can be classified according to the electrolyte and fuel used, the existing cells are

Alkaline fuel cell (AFC): these cells employ an electrolytic solution of potassium
hydroxide and can operate at high and low temperatures (220ΒΊC-120ΒΊC) depending
on the concentration of KOH. The electrochemical reaction is:
π΄π‘›π‘œπ‘‘π‘’: 2𝐻2 + 4𝑂𝐻 βˆ’ β†’ 4𝐻2 𝑂 + 4𝑒 βˆ’
πΆπ‘Žπ‘‘β„Žπ‘œπ‘‘π‘’: 2𝑂2 + 2𝐻2 𝑂 + 4𝑒 βˆ’ β†’ 4𝑂𝐻 βˆ’
π‘‚π‘£π‘’π‘Ÿπ‘Žπ‘™π‘™: 2𝐻2 + 𝑂2 β†’ 2𝐻2 𝑂
The initial use of these cells was for spacecraft and was designed by NASA.
Advantages of AFC cells include: use of non-precio...

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Cornell University

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