Simulation of cryo-compressed adsorption hydrogen storage performance of type III tank in a wide pressure range

Abstract Combining nano-porous materials with cryo-compressed hydrogen for cryo-compressed adsorption hydrogen storage offers a new approach to achieving higher hydrogen storage density at relatively lower storage pressures. However, current research focuses on room temperature or 77 K and pressures below 10 MPa, lacking studies on cryo-compressed adsorption hydrogen storage. In this study, the type III hydrogen storage tank model is established. AX-21, MOF-177, MOF-5, Cu 3 (BTC) 2 , and MIL-101 are selected to be added to the storage tank, respectively. The modified Dubinin-Astakhov (D-A) model is used to simulate hydrogen adsorption isotherms. Subsequently, the gravimetric/volumetric hydrogen storage densities of the type III tank with different adsorption materials at 77-298 K and 0.1-50 MPa are simulated. The effects of bulk density of adsorption materials are analyzed. The results show that cryo-compressed adsorption hydrogen storage achieves liquid hydrogen density across multiple temperature ranges, reducing hydrogen storage pressure and demonstrating promising application prospects.