| 초록 |
Heterogeneous porous activated carbon (AC) with different textural properties were used to investigate the adsorption equilibrium of two well-known bio gases, carbon dioxide and methane. The textural properties of AC were controlled by changing the ratio of potassium hydroxide. The surface energetic heterogeneity and the textural parameters of the prepared AC were then examined using nitrogen adsorption analysis. The adsorption equilibrium amounts of two different bio gases was measured using a volumetric system at room temperature ranging from 0 to 110 kPa. It was found that the adsorption equilibrium amount is closely related to the pore width of AC. In addition, the data obtained fit well with three well-known adsorption isotherm equations: Langmuir, Freundlich and Sips. The adsorption integral equation was useful in understanding the surface energetic heterogeneity of ACs. |
