Improved hydrogen sorption kinetics in Mg modified by chosen catalysts

0503832 - ÚFM 2020 RIV GB eng J - Článek v odborném periodiku
Čermák, Jiří - Král, Lubomír - Roupcová, Pavla
Improved hydrogen sorption kinetics in Mg modified by chosen catalysts.
International Journal of Hydrogen Energy. Roč. 44, č. 16 (2019), s. 8315-8324. ISSN 0360-3199. E-ISSN 1879-3487
Grant CEP: GA ČR(CZ) GA17-21683S; GA MŠMT(CZ) LQ1601
Institucionální podpora: RVO:68081723
Klíčová slova: Hydrogen storage * Mg alloys * Carbon black * Catalysis
Obor OECD: Materials engineering
Impakt faktor: 4.939, rok: 2019
Způsob publikování: Omezený přístup
https://www.sciencedirect.com/science/article/pii/S0360319919306688?via%3Dihub

Hydrogen sorption characteristics were investigated in Mg modified by ten chosen catalyzing additives X = Mg2Si, Mg2Ge, Mg17Al12, Mg5Ga2, NaCl, LiCl, NaF, LiF and by two combinations Ni + Mg17Al12 and Ni + Mg2Si. Amorphous carbon (CB) was used as an anti-sticking component. It was found that optimum content of both X and CB was between 10 and 14 wt %. To assess the effect of X itself upon the sorption kinetics, concentration of both X and CB was fixed to about 12 wt %. The shortest desorption times t09 (time to desorption of 90 pct of stored hydrogen) showed alloys with X = NaF, Mg2Si, Mg2Ge and NaCl. Careful measurements of equilibrium hydrogen pressure, peq, at 623 K showed an increase in peq for added chlorides, fluorides, Mg2Ge and also for Mg2Si. TPD experiments revealed desorption peaks for X = NaCl, LiF shifted down to temperatures as low as 597 K.
Trvalý link: http://hdl.handle.net/11104/0300020