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KRÁL, L. ČERMÁK, J. ROUPCOVÁ, P.
Original Title
HYDROGENATION PROPERTIES OF BALL-MILLED Mg-Ti-C-Zr COMPOSITE
Type
conference paper
Language
English
Original Abstract
The hydrogen storage properties of ball-milled Mg-Ti-Zr-C composite (1.8 wt.% Ti, 1.9 wt.% Zr and 0.2 wt.% C) were investigated. It has been previously shown, that the addition of Ti, Zr and C improved its storage properties. This beneficial effect of additives upon hydrogen storage properties can be explained by catalysis by the particles rich in Ti or Zr located on the surface of Mg grains. They provide effective pathways for the hydrogen diffusion into the MgH2. The morphological and microstructural characteristics were investigated by scanning electron microscopy and by X-ray diffraction. The hydrogen sorption was measured by Sieverts method using Setaram PCT-Pro device. In this paper, sorption behaviour of the composite after ball-milling and after aging on the air was compared. The ball-milled composite adsorbed 3.5 wt.% H-2 within 10 min at 623 K. However, hydrogen storage capacity of the composite aged on the air for 7 months remarkably decreased: The aged composite adsorbed within 10 min only 2 wt.% H-2 at 623 K and the sorption capacity decreased from 4.7 wt.% H-2 to 2.1 wt.% H-2.
Keywords
Hydrides; hydrogen storage; catalysis; hydrogen; Mg-alloys
Authors
KRÁL, L.; ČERMÁK, J.; ROUPCOVÁ, P.
Released
1. 1. 2016
ISBN
978-80-87294-67-3
Book
METAL 2016: 25TH ANNIVERSARY INTERNATIONAL CONFERENCE ON METALLURGY AND MATERIALS
Pages from
1445
Pages to
1449
Pages count
5
BibTex
@inproceedings{BUT176847, author="Lubomír {Král} and Jiří {Čermák} and Pavla {Roupcová}", title="HYDROGENATION PROPERTIES OF BALL-MILLED Mg-Ti-C-Zr COMPOSITE", booktitle="METAL 2016: 25TH ANNIVERSARY INTERNATIONAL CONFERENCE ON METALLURGY AND MATERIALS", year="2016", pages="1445--1449", isbn="978-80-87294-67-3" }