Word: co2
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Dates: during 1960-1960
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...removed. Then there is hydrogen, which emanates from batteries, can form an explosive mixture if as little as 4% accumulates anywhere. The smelly organic vapors from garbage and human sources must also be removed. Most of this unwanted stuff is eliminated by a hot catalyst that oxidizes it to CO2 and water. All traces of organic matter that escape the catalyst are mopped up by a bed of activated carbon, and finally an electrostatic precipitator removes the last aerosols (dust or smoke particles) from the sub's fresh, clean world. In case of an atmosphere-fouling emergency, the crew...