For transport needs the hydrogen is mostly stored in a compressed (at 350-700 bars) form, while methods for its storage at lower pressures are rapidly developing. In particular, nanoporous oxides and zeolites, which do not normally absorb notable amount of hydrogen, with a small Pd additive or ion exchange demonstrate enhanced hydrogen adsorption properties. An original thermogravimetric method has been developed to study the hydrogen adsorption in zeolite, consisting of its heating in the inert gas (argon, nitrogen) flow and cooling in the hydrogen atmosphere. It is found that natural zeolite (clinoptilolite) with Mg-ion exchange possesses a high adsorption capacity for hydrogen - up to 6.2 wt%, which is explained by its encapsulation in zeolite pores. The FTIR spectra of the hydrogen-treated samples have shown new absorption bands at 2340 and 2360 cm-1.
1. US Department of Energy (2006) Planned Program Activities for 2005-2015, website address (May 2012): http://www1.eere.energy.gov/hydrogenandfuelcells/mypp/
2. Dinca, M., & Long, J.R. (2008). Hydrogen Storage in Microporous Metal-Organic Frameworks with Exposed Metal Sites. Angew. Chem. Int. Ed., 47, 6766-6779.
3. Sakintuna, B., Lamari-Darkrim, F., & Hirscher, M. (2007). Metal hydride materials for solid hydrogen storage: a review. Intern. J. of Hydrogen Energy, 32, 1121-1140.
4. Graetz, J. (2012) Metastable Metal Hydrides for Hydrogen Storage. ISRN MaterialsScience, 2012, ID 863025; DOI:10.5402/2012/863025
5. Van den Berg, A.W.C., & Arean, C.O. (2008). Materials for hydrogen storage: current research trends and perspectives. Chem. Commun., 668-681.
6. Noejung, Park N., Choi, K., Hwang, J., Kim, D.W., Kim, D.O., & Ihm, J. (2012). Progress on first-principles-based materials design for hydrogen storage. PNAS, 7; DOI: 10.1073/pnas.1217137109
7. Xiaoming, D., Jing, L., & Erdong, W. (2010). The Study of Adsorption of Hydrogen on Zeolites. Progress in Chemistry, 22, 248-254.
8. Langmi H.W., & McGrady, G.S. (2007). Non-hydride systems of the main group elements as hydrogen storage materials. Coord. Chem. Rev., 251, 925-935.
9. Broom, D.P. (2011). Hydrogen Storage Materials: The Characterisation of TheirStorage Properties. London: Springer-Verlag.
10. Efstathiou, A.M., Borgstedt, E.R., Suib, S.L., & Bennett, C.O. (1992). Encapsulation of molecular hydrogen in ion-exchanged zeolites at 1 atm. Journal of Catalysis, 135, 135-146.
11. Grinberga, L., Kleperis, J., Bajars, G., et. al. (2008). Estimation of hydrogen transfer mechanisms in composite materials. Solid State Ionics, 179, 42-45.
12. Grinberga, L., Sivars, A., Kulikova, L., Serga, V., & Kleperis, J. (2011). Catalyst activation of silica nano-based pore structure material for hydrogen storage. IOP Conf. Series: Materials Science and Engineering, Vol. 23; 012009. DOI: 10.1088/1757-899X/23/1/012009.
13. Lesnicenoks, P., Berzina, A., Grinberga, L., & Kleperis, J. (2012) Research of hydrogen storage possibility in natural zeolite. International Scientific Journal forAlternative Energy and Ecology ISJAEE, 9, 16-20.
14. Li, G. (2005). FT-IR studies of zeolite materials: characterization and environmental applications. Dissertation, University of Iowa, http://ir.uiowa.edu/etd/96.
15. Arean C.O., Bonelli B., Delgado M.R., & Garrone E. (2009). Hydrogen storage via physisorption: the combined role of adsorption enthalpy and entropy. Turk. J. Chem., 33, 599-606; DOI:10.3906/kim-0812-22.
16. Coudert, F.-X., Vuilleumier R., & Boutin, A. (2006). Dipole moment, hydrogen bonding and IR spectrum of confined water. Chem. Phys. Chem., 7, 2464-2473; DOI: 10.1002/cphc.200600561.