just some cause if I where to explain them all it would take forever. On type of fuel cell is the Phosphoric Acid or 9 (PAFC). It is currently available on the market. More the 200 fuel cell systems have been installed worldwide. PAFC generate electricity at more than 40% efficiency and nearly 85% of the steam this fuel cell produces is used for congregate ions. (http://www.fuelcells.org/Fetypes.hhm.) Operating temperatures range from 300 to 400 degrees F or 150 to 200 degrees C. Lower temperature makes phosphoric acid a poor ionic conductor, and carbon monoxide (C0) poisoning of the Platinum (Pt) Electro catalyst in the anode becomes severe. Electrolyte in liquid phosphoric acid is soaked in a matrix. Some advantages to this fuel cell are. It can use impure hydrogen as fuel can tolerate (CO) concentration of 1.5 percent, which broadens the choice of fuel. Some dis-advantages of this fuel cell PAFC is it expensive. "Platinum" Generates low current and power large in size and weight however are the most mature fuel cell in technology. Existing PAFC have out put up to 200 KW, and 1 MW units. (http:///www.fuelcells.org/fetypes.httm.) he Anode formula for this cell is H2 (y)->2H+(ag)+2e-) (http:///www.fuelcells.org/fetypes.httm.) Another cell I should mention is the Molten Carbonate or (MCFC) which is a liquid solution of lithium, sodium andor potassium carbonates, soaked in a matrix for an electrolyte. This cell promises high fuel to electricity effencies 60% normally or 85% with cogenerations and operate at about 1,200 degrees F or 650 degrees C. The cell formula for this type of fuel cell is (h2 (g)+1/2 02(g)->H2o (I). (http://www.fue
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