Abstract: | Reaction of CO2 with LiOH requires the presence of water in an amount sufficient to produce monohydrate thium hydroxide (LiOH · H2O) prior to or simultaneously with the CO2 reaction. For a given CO2 content in the air stream at any given temperature, there is a corresponding humidity of the feed stream which results in maximum CO2 absorption efficiency. Two commercially available LiOH granules with different porosities and water contents were studied. The combined effects of temperature and humidity on CO2 absorption patterns and CO2 absorption capacities were observed. Results showed that temperature and water content of the air stream did change the CO2 absorption pattern and the CO2 absorption capacity for LiOH absorbent.When the relative humidity in the air stream is below 14%, anhydrous LiOH has a higher CO2 absorption capacity at higher temperatures. However, above 40% relative, lower temperatures are favored. Partially hydrated LiOH granules have a higher CO2 absorptions capacity at lower temperatures at all relative humidities in the air stream except 14%. |