화학공학소재연구정보센터
Fluid Phase Equilibria, Vol.427, 56-71, 2016
A macroscopic investigation to interpret the absorption and desorption of hydrogen in LaNi4.85Al0.15 alloy using the grand canonical ensemble
Using the grand canonical ensemble in statistical physics, a hydrogen absorption and desorption isotherms on LaNi4.85 Al-0.15 alloy have been modeled by a monolayer model with two level of energy. The model has six physicochemical parameters which are deduced from the fitting of the isotherms at three temperatures T = 298 K, T = 303 K and T = 313 K. These parameters were used to better understand and compare between the absorption and desorption phenomena. A macroscopic study is achieved through thermodynamic functions as the internal energy; the entropy, the free enthalpy, the chemical potential, the enthalpy, and the free energy. We proved the coexistence of the alpha and beta phases during absorption process. (C) 2016 Published by Elsevier B.V.