Yes, potassium hydroxide will absorb carbon dioxide. Potassium hydroxide is a strong base and will react with carbon dioxide to form potassium carbonate and water. The reaction can be represented as:

2KOH + CO2 → K2CO3 + H2O

The reaction is exothermic, meaning that it releases heat. Potassium hydroxide is also a deliquescent substance, meaning that it will absorb moisture from the air, so it is important to store it in an airtight container.