System level permeability modeling of porous hydrogen storage materials.

Kanouff, Michael P. ; Dedrick, Daniel E. ; Voskuilen, Tyler (Purdue University, West Lafayette, IN)

关键词: ASPECT RATIO;    CHANNELING;    FORECASTING;    HYDRIDES;    HYDROGEN;    HYDROGEN STORAGE;    KNUDSEN FLOW;    PERFORMANCE;    PERMEABILITY;    POROUS MATERIALS;    SIMULATION;    SODIUM;    TRANSPORT Permeability.;    Gases-Permeability-Mathematical models.;    Hydrogen-Storage;   

DOI  :  10.2172/984141
RP-ID  :  SAND2010-0254
PID  :  OSTI ID: 984141
Others  :  TRN: US201015%%1068

学科分类：再生能源与代替技术

美国|英语

来源: SciTech Connect

【 摘 要 】

A permeability model for hydrogen transport in a porous material is successfully applied to both laboratory-scale and vehicle-scale sodium alanate hydrogen storage systems. The use of a Knudsen number dependent relationship for permeability of the material in conjunction with a constant area fraction channeling model is shown to accurately predict hydrogen flow through the reactors. Generally applicable model parameters were obtained by numerically fitting experimental measurements from reactors of different sizes and aspect ratios. The degree of channeling was experimentally determined from the measurements and found to be 2.08% of total cross-sectional area. Use of this constant area channeling model and the Knudsen dependent Young & Todd permeability model allows for accurate prediction of the hydrogen uptake performance of full-scale sodium alanate and similar metal hydride systems.