Does Potassium Superoxide also absorb Carbon Monoxide? Potassium Superoxide ($\ce{KO2}$) is used as an oxygen provider and carbon dioxide scrubber in life support systems
$$\ce{2KO2 + H2O -&gt; 2KOH + O2} \\
\ce{2KOH + CO2 -&gt; K2CO3 + H2O}$$
I encountered a question that asked if Potassium superoxide can also serve as a scrubber for $\ce{CO}$. I thought of a reaction where $\ce{KO2}$ oxidized $\ce{CO}$ to $\ce{CO2}$ and the $\ce{CO2}$ was absorbed as previously mentioned
$$\ce{2KO2 + 2CO -&gt; K2O2 + 2CO2}$$
Another possible reaction would be reduction of $\ce{KO2}$ to $\ce{K2O}$
$$\ce{2KO2 + 3CO -&gt; K2O + 3CO2}$$
I could not find these reactions or similar ones mentioned in any literature online. This article describes the working of $\ce{KO2}$ in detail but I could not find a mention of carbon monoxide in there.
Can $\ce{KO2}$ also be used to scrub $\ce{CO}$? If so, how?
As the other answer and comments imply, potassium superoxide is not a good reagent for absorbing carbon monoxide.  Cuprous chloride solution works better, as in this study[1] where the salt is dissolved in an ammonia-bearing solution.
Reference:

R. V. Gholap and R. V. Chaudhari, &quot;Absorption of carbon monoxide with reversible reaction in cuprous chloride solutions&quot;, Ind. Eng. Chem. Res. 27, 11, 2105–2110 (1988).