Carbon Dioxide Adsorption in Nanopores of Coconut Shell Chars for Pore Characterization and the Analysis of Adsorption Kinetics

Table 2

Fitted parameters of Freundlich and Sips isotherm equations for CO₂ adsorption at 273 K by coconut-shell chars prepared at various carbonization temperatures.

Carbonization temperature (°C)	Freundlich equation			Sips equation
	250	0.0327	1.43	0.9991	30.4	7.4 × 10^−5	1.37	0.9985
350	0.1130	1.83	0.9988	32.3	4.8 × 10^−5	1.73	0.9981
450	0.2192	2.17	0.9987	47.4	1.3 × 10^−5	2.08	0.9987
550	0.3577	2.43	0.9968	97.7	2.0 × 10^−6	2.36	0.9980