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such as sparks from electrical equipment, static electricity sparks, open flames, or any extremely hot objects. hydrogen and air mixtures within the flammable range can explode and may burn with a pale blue, almost invisible flame. manufacture hydrogen is produced by the steam reforming of natural gas
, the electrolysis of water and the dissociation of ammonia. hydrogen is also a by-product of petro- leum distillation and chlorine manufacture. the primary method of hydrogen generation is steam reforming of natural gas. other feedstocks, which are less common, can include ethane, propane, butane, and...
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