Method for the preparation of active magnesium hydride-magnesium hydrogen storage systems, which reversibly absorb hydrogen

US5198207A · kind A · utility

Assignee

• Th. Goldschmidt. AG · DE

Inventors

• Wilfried Knott · Essen, DE
• Klaus-Dieter Klein · Oberkochen, DE
• Gotz Koerner · Essen, DE

Key dates

• Filing date: Oct 30, 1991
• Grant date: Mar 30, 1993
• Expiry date: Oct 30, 2011

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10S502/526
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

A method is disclosed for the preparation of active magnesium hydride-magnesium-hydrogen storage systems, which reversibly absorb hydrogen, with addition of a catalyst for the absorption of hydrogen with the formation of hydride. Magnesium hydride particles.ltoreq.400 .mu.m in diameter are added in an amount of at least 1.2% by weight, based on the magnesium to be hydrogenated, as catalyst during the first hydrogenation to the finely divided magnesium to be hydrogenated. The hydrogenation is carried out at a temperature of .gtoreq.250.degree. C. and a pressure of 0.5 to 5 MPa. The method is carried out with intensive stirring of the material that is being reacted.