Ballard Power -world leader zero-emission PEM fuel cells Message Board

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Technology Stocks : Ballard Power -world leader zero-emission PEM fuel cells

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To: CH4 who wrote (5332)	12/6/2000 1:58:51 AM
From: KW Wingman	Read Replies (1) of 5827

While H2S is bad news, your statement is a stretch. As in; one whiff of a fart and within 5 seconds you're a vegetable, within 10 seconds you're dead. one whiff of H2S within 5 seconds you're a vegetable, within 10 seconds you're dead. In truth, the odor threshold for H2S (Hydrogen Sulphide) is a few parts per billion in air and it smells of bad eggs. However, at higher concentrations - 1-3ppm you may not smell it as H2S numbs your sense of smell and effectively at these concentrations is odorless. If the H2S is above 3ppm it may cause you health problems. At 10ppm the law limits the exposure to 8 hours per day - and from experience you will feel terrible after this level of exposure. At 15ppm the law limits your exposure to 15 minutes per day. At a few hundred ppm -H2S in air you may pass out in less than an hour At a few thousands of ppm - H2S in air you may die on contact with the gas as the nerves around the heart and lungs are paralyzed. If you smell rotten eggs and you didn't fart yourself, then you might want to get out of the area. Move "up wind" in case there has been a significant release of H2S.

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