Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7719782 | International Journal of Hydrogen Energy | 2014 | 7 Pages |
Abstract
A new model is developed to analyze oxygen interference in hydrogen storage materials. It is based on the competitive adsorption isotherm between the two gases, with the parameters fitted from molecular dynamic simulations. The model is applied to a system consisting of graphene sheets separated by different distances. For a gas-phase mixture of hydrogen (99.9%) and oxygen (0.1%) in interaction with porous graphite of 6.5Â Ã
(optimum size) it can be observed that after 50 cycles of charging/discharging the blocking of active sites of the material by oxygen is â¼10%, due to progressive pollution of the system by oxygen. The model presented here may easily be extended to other systems of interest, involving other blocking species or adsorbent materials.
Related Topics
Physical Sciences and Engineering
Chemistry
Electrochemistry
Authors
A. Sigal, M. Villarreal, M.I. Rojas, E.P.M. Leiva,