Determination of compressibility factor and fugacity coefficient of hydrogen in studies of adsorptive storage

The compressibility factor (z) of hydrogen was evaluated from the experimental p–V–T data and calculated from equations of state, such as the SRK equation and BWR equation as well. The effect of z on the adsorbed amount calculated was demonstrated by the adsorption of hydrogen on 5A-zeolite. The compressibility factor and the fugacity coefficient of hydrogen were formulated based on the experimental p–V–T data for 60–333 K and up to 25 MPa.