The bases of normal catalyst of Carbon Monoxide is the mixture of Copper Oxide and Manganese Dioxide, this kind of normal catalyst have very good catalytic effect under NPT drying condition. But its disadvantage is that it is quite sensitive to the moisture, it will be quickly poisoned and disabled once the humidity exceed 45%, so it is suitable to use under the dry environment. When the concentration of Carbon Monoxide is low, the catalytic effect of normal catalyst of Carbon Monoxide is not so good than the precious metal catalyst of Carbon Monoxide.

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