Adsorption storage

For simplicity and reduced cost, an adsorption storage system using single stage compression is attractive, which puts a practical upper limit to the adsorption... 

Adsorption of supercritical gases takes place predominantly in pores which are less than four or five molecular diameters in width. As the pore width increases, the forces responsible for the adsorption process decrease rapidly such that the equilibrium adsorption diminishes to that of a plane surface. Thus, any pores with widths greater than 2 nm (meso- and macropores) are not useful for enhancement of methane storage, but may be necessary for transport into and out of the adsorbent micropores. To maximize adsorption storage of methane, it is necessary to maximize the fractional volume of the micropores (<2 nm pore wall separation) per unit volume of adsorbent. Macropore volume and void volume in a storage system (adsorbent packed storage vessel) should be minimized [18, 19]. 

Chaudron, G., Natural Gas for Vehicles Adsorption Storage Tanks Intercom, Belgium 1989... 

To run adsorption storage systems efficiently the appropriate adsorbent has to be used. The right choice is possible on the basis of the measured adsorption equilibrium. The adsorption equilibrium of water vapor and different adsorbents (zeolites and silica gels) was experimentally found [3,4], The differential heat of adsorption (AHd) was calculated from the equilibrium data. 

Keywords Activated carbon Adsorption Storage Natural gas Cycling operation... 

O. Talu, An overview of adsorptive storage of natural gas, in M. Suzuki (Ed.), Proceedings of the fourth International Conference on Fundamentals of Adsorption, Kyoto, 1992, pp. 655-622. 

Keywords Carbon, hydrogen, sorption, heat pipe, adsorption storage... 

Vasiliev L.L., Mishkinis D.A., Kanonchik L.E., Khrolenok V.V., Zhuravlyov A.S. (1997) Activated carbon ammonia and natural gas adsorptive storage. Ext. Abs. 23rd Biennial Conf. on Carbon. Carbon 97 , Philadelphia,. Vol. 1, 334-335. 

Zhang X, Cao D, Chen J (2003) Hydrogen adsorption storage on single-walled carbon nanotube arrays by a combination of classical potential and density functional theory. J. Phys. Chem. B 107 4942-4950, and papers cited... 

Barbosa-Mota, J.P., Rodrigues, A.E., Saatdjian, E., and Tondeur, D. (1997). Dynamics of natural gas adsorption storage system employing activated carbon. Carbon, 35(9), 1259-70. 

Bhatia S K and Myers A L (2006), Optimum conditions for adsorptive storage , Langmuir, 22, 1688. 

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