The Influence of the Structural and Energetic Characteristics of the Microporous Structure of Carbon Adsorbents on Hydrogen Adsorption

Resumo

A new carbon microporous adsorbent denoted as MPU-007 with a specific micropore volume as large as 1.44 cm³/g has been synthesized. Hydrogen adsorption on this adsorbent has been studied at temperatures of 303, 313, 323, and 333 K and pressures of up to 15 MPa. The maximum adsorption value is 12 mmol/g (2.4 wt %) at 15 MPa and 303 K. The obtained data have been compared with the results of previous studies of hydrogen adsorption on a number of microporous carbon adsorbents with increasing specific micropore volume. It has been shown that the differential molar isosteric heats of hydrogen adsorption decrease from 10 to 4 kJ/mol with an increase in the degree of micropore filling.