Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5148485 | International Journal of Hydrogen Energy | 2017 | 14 Pages |
Abstract
In the present work, experimental absorption isotherms of hydrogen in LaNi5 at three temperatures have been fitted using a monolayer model treated by statistical physics by means of the grand canonical ensemble. Six parameters of the model are fitted, namely two numbers of absorbed atoms per, site n1 and n2, two receptor site densities, N1M and N1M and two energetic parameters, P1 and P2. The behaviors of these parameters are discussed in relationship with absorption process. Starting from the monolayer model, we determined the absorption energies which are typically ranged between 85 and 101Â kJ/mol comparable to usual chemical bond energies. Calculated thermodynamic potentials such as internal energy (Eint) and Gibbs free energy (G) suggested that the absorption processes was exothermic and spontaneous.
Related Topics
Physical Sciences and Engineering
Chemistry
Electrochemistry
Authors
Sarra Wjihi, Lotfi Sellaoui, Mohamed Bouzid, Houcine Dhaou, Salah Knani, Abdelmajid Jemni, Abdelmottaleb Ben Lamine,