Abstract

The hydrogen encapsulation capacities of Na[sub 12]-zeolite A with respect to pressure ranging from 10 to 150 atm at an isotherm of 623 K were calculated and compared with experimentally measured values. For the calculation, the hydrogen gas molecules encapsulated in the zeolite A were treated as three-dimensional lattice gas distributed in the cavities which lie in the three-dimensional aluminosilicate lattice of the zeolite A. The results indicated that the lattice gas theory is good enough both quantitatively and qualitatively to predict the hydrogen encapsulation capacities. 13 refs., 3 figs., 1 tab.

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