Adsorption Storage of Gaseous Hydrogen at Cryogenic Temperatures

Abstract

The storage of hydrogen on board vehicles is one of the most criticalissues for the transition towards an hydrogen-based transportationsystem. The physical adsorption of hydrogen on activated carbon canreduce the pressure required to store compressed gases. Though anefficient adsorption-based storage system for vehicular use of naturalgas can be achieved at room temperature, the application of thistechnology to hydrogen using activated carbon as the adsorbent requiresits operation at cryogenic temperature. In this paper we present acomparative study of the efficiency of adsorption and compressed gasstorage of hydrogen as a function of temperature and pressure. Theisothermal hydrogen storage and net storage densities for passivesystems at 77 K, 150 K and 293 K are compared and discussed.