Hydrogen Storage of a Fixed Bed of Nanocrystalline Mixed Oxides

Table 3

Hydrogen uptake calculation using different isotherms.

Langmuir, 𝑊=𝑊𝑚⋅𝐾𝐿⋅𝐶/(1+𝐾𝐿⋅𝐶)
𝑇𝐿 (°C)	𝑊𝑚/(mg/g)	𝐾𝐿	𝑅^2
30	29.97	2.97	0.99
60	16.95	2.10	0.99
90	13.86	1.24	0.99
Freundlich, 𝑊=𝐾𝐹⋅𝐶^1/𝑛
𝑇𝐹 (°C)	𝐾𝐹	𝑛	𝑅^2
30	3.93	24.39	0.98
60	3.15	15.88	0.99
90	2.72	9.26	0.98

𝑊_𝑚 Maximum adsorbed amount, 𝑊 ads. amount; 𝐾 equilibrium constant, 𝐶 concentration; 𝑅 correlation coefficient.