Numerical analysis of candidate materials for multi-stage metal hydride hydrogen compression processes

Thermodynamic features of metal hydride thermal sorption compressors and perspectives of their application in hydrogen liquefaction systems

“…This feature forms a basis of thermo-chemical technology of hydrogen compression realised in a thermal sorption compressor (TSC) utilising metal hydrides (MHs), in which exothermic and endothermic processes of H 2 absorption and desorption in the MH are similar to processes of suction and discharge in a mechanical compressor [1,[6][7][8][9][10][11][12][13]. As a rule, the development of an MH TSC is preceded by its modelling aimed at the determination of the number of H 2 compression stages including proper selection of the MH materials to provide compression from p 1 = p min to p 2 = p max (specified by a customer) over an available temperature range, T 1 = T min … T 2 = T max [13][14][15][16], as well as optimisation of heat transfer performance in the MH beds in MH containers for hydrogen compression (generators-sorbers) to improve the dynamic characteristics of the TSC [14,[16][17][18].…”

Numerical investigation on the operation and energy demand of a seven-stage metal hydride hydrogen compression system for Hydrogen Refuelling Stations

“…In another study, a dynamic response during hydrogen discharge was introduced, where the factors that drive the hydrogen were taken into account; the pressure difference between the 'free' hydrogen and the atmosphere, as well as the actual desorption from the metal hydride [89]. In a previous work [90], the authors developed and presented a numerical approach to describe the operation of a three stage MHHC and made a conversation regarding the selection of the materials and the number of compression stages. When building and developing a MHHC, it is crucial to select the number of stages according to the application, the thermal and cost requirements and the customer needs.…”

Study on the hydrogenation of an Mm‐based AB 5 ‐intermetallic for sustainable building applications

“…25,26 There are various parameters affecting the thermodynamics of the metal hydrides, 27,28 such as the hydrides thermal conductivity, the heat capacity, and the enthalpy and entropy change during the hydride formation/deformation. 29 Some other parameters regarding the hydride tank design, such as the bed geometry, the heat management, the overall heat transfer coefficient, the overall beds thermal resistance, and the packing conditions, are also very important and crucial for the effective hydrogen storage/release that must be considered when designing a metal hydride storage system. 30,31 Finally, for the storage of the maximum possible amount of hydrogen at low-pressure beds, several parameters are crucial, such as grinding alloys, the reduction of oxygen poisoning tendency, and the cycling performance.…”

“…21 Amongst those technologies, the solid-state hydrogen storage presents the less disadvantages as compared with the hydrogen storage technology as compressed gas and liquid hydrogen, 22 as hydrogen can be effectively store at moderate pressure and temperature conditions. 29 Some other parameters regarding the hydride tank design, such as the bed geometry, the heat management, the overall heat transfer coefficient, the overall beds thermal resistance, and the packing conditions, are also very important and crucial for the effective hydrogen storage/release that must be considered when designing a metal hydride storage system. 25,26 There are various parameters affecting the thermodynamics of the metal hydrides, 27,28 such as the hydrides thermal conductivity, the heat capacity, and the enthalpy and entropy change during the hydride formation/deformation.…”