MgH2-based hydrogen storage tank: Kinetics, reversibility, and MWCNTs content. (April 2022)

• Record Type: Journal Article
• Authors: Thongtan, Puttimate; Thiangviriya, Sophida; Utke, Oliver; Utke, Rapee
• Is Part Of: Journal of physics and chemistry of solids. Volume 163(2022)
• Publication Date: 2022-04
• Subjects: Reversible hydrogen sorption -- Reaction mechanism -- Gas diffusion -- Thermal conductivity -- Hydride layers; Solids -- Periodicals; Solides -- Périodiques; Solids; Periodicals; 530.41
• DOI: 10.1016/j.jpcs.2022.110578
• Languages: English
• ISSNs: 0022-3697

Abstract

Abstract: The de/rehydrogenation performance, mechanism, and reversibility of a MgH2 -based hydrogen storage tank with enhanced packing volume of up to 337.40 mL have been investigated. Due to significant upscaling, the MWCNTs loading content significantly affects the thermal conductivity and hydrogen diffusion in the tank. By increasing the MWCNTs content from 5 to 10 wt%, the hydrogen sorption kinetics is significantly improved. This has led to an enhancement in the reversible hydrogen capacity from 38.9 to 52.5% of the theoretical value upon 10–15 hydrogen release and uptake cycles. In addition, the de/rehydrogenation behavior at different positions in the radial and axial directions of the tank have been studied by tracking temperature and pressure changes observed during the hydrogen exchange reaction and studying the chemical compositions of the sample after cycling. Graphical abstract: Image 1 Highlights: MgH2 -based tank with significantly enlarged packing volume of up to 337.40 mL. Effects of the MWCNTs content on H2 diffusion and thermal conductivity inside the tank. Enhanced reversible H2 capacity of up to 52.5% of the theoretical value. De/rehydrogenation performance in the radial and axial directions of the tank.