Magnesium gasar as a potential monolithic hydrogen absorbent

• DOI: 10.1016/j.ijhydene.2021.01.166
• Publication Date: 2021-02-21T08:58:01Z
• Authors: Grzegorz Boczkal; Malwina Janoska; Daria Setman; Erhard Schafler; Piotr Dlugosz; Pawel Darlak
• Keywords: HEAT-TRANSFER PERFORMANCE; MG; 103018 Materialphysik; FABRICATION; SDG 7 – Bezahlbare und saubere Energie; 02 engineering and technology; Hydrogen storage; Magnesium gasar; Hydrogen absorption; ELEMENTS; Hydrogen absorption calculation; SDG 7 - Affordable and Clean Energy; Gasar production; 0210 nano-technology; 103018 Materials physics; Hexagonal metals

The study focuses on the aspect of using structure gasars, i.e. materials with directed open porosity, as a potential hydrogen storage. tested gasar is composed large number thin, tubular pores running through entire longitudinal section sample. This allows to easily penetrate into sample volume. analysis pore distribution showed that longest diffusion path needed for full penetration metal about L = 50–70 μm, regardless external dimensions Attempts hydrogenate magnesium have shown its ability accumulate at level 1 wt%. obtained results were compared best result was ZK60 alloy after equal channel angular pressing (ECAP) and crushed powder form. exceeded 4 wt% accumulated in structure, theoretical 6.9 maximum capacity. A model theoretic absorption capacity pure also carried out based concentration vacancies structure. correlate well experimental data.