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Technology Stocks : Ballard Power -world leader zero-emission PEM fuel cells -- Ignore unavailable to you. Want to Upgrade?

To: Sid Turtlman who wrote (2728)	6/8/1998 11:11:00 PM
From: Hawkeye	Read Replies (1) \| Respond to of 5827

Hydrogen and Fuel Cell Letter for June is out! Always interesting to see what's going on in the real world. www1.mhv.net Regards

To: Sid Turtlman who wrote (2728)	6/9/1998 10:17:00 PM
From: Dr. Ezzat G. Bakhoum	Read Replies (1) \| Respond to of 5827

PEM versus electrolyte-based fuel cells: Sid, with all my respect, I think you're the one who is a little confused when you compare PEM fuel cells to other technologies. It's actually the PEM fuel cell that is much more tolerant to impurities in the hydrogen flow than electrolyte-based fuel cells. That's because impurity gases in the hydrogen stream REACT with the electrolyte (especially at high temperatures), and accelerate the decomposition of the electrolyte; and frequent maintenance becomes a major issue. Why do you think the automakers didn't choose the molten carbonate or the phosphoric acid types and chose instead the PEM cell? (Of course, the same holds true for the stationary power plants). Ezzat