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Title: Direct synthesis of magnesium borohydride

Abstract

A method is disclosed for directly preparing an alkaline earth metal borohydride, i.e. Mg(BH.sub.4).sub.2, from the alkaline earth metal boride MgB.sub.2 by hydrogenating the MgB.sub.2 at an elevated temperature and pressure. The boride may also be doped with small amounts of a metal chloride catalyst such as TiCl.sub.3 and/or NiCl.sub.2. The process provides for charging MgB.sub.2 with high pressure hydrogen above at least 70 MPa while simultaneously heating the material to about 350.degree. C. to about 400.degree. C. The method is relatively simple and inexpensive and provides a reversible hydride compound having a hydrogen capacity of at least 11 wt %.

Inventors:
 [1];  [2];  [3]
  1. Kennewick, WA
  2. Honolulu, HI
  3. Kailua, HI
Issue Date:
Research Org.:
Sandia National Laboratories (SNL), Albuquerque, NM, and Livermore, CA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1041045
Patent Number(s):
8147788
Application Number:
12/553,633
Assignee:
Sandia Corporation (Livermore, CA)
Patent Classifications (CPCs):
Y - NEW / CROSS SECTIONAL TECHNOLOGIES Y02 - TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE Y02E - REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
C - CHEMISTRY C01 - INORGANIC CHEMISTRY C01B - NON-METALLIC ELEMENTS
DOE Contract Number:  
AC04-94AL85000
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY

Citation Formats

Ronnebro, Ewa Carin Ellinor, Severa, Godwin, and Jensen, Craig M. Direct synthesis of magnesium borohydride. United States: N. p., 2012. Web.
Ronnebro, Ewa Carin Ellinor, Severa, Godwin, & Jensen, Craig M. Direct synthesis of magnesium borohydride. United States.
Ronnebro, Ewa Carin Ellinor, Severa, Godwin, and Jensen, Craig M. Tue . "Direct synthesis of magnesium borohydride". United States. https://www.osti.gov/servlets/purl/1041045.
@article{osti_1041045,
title = {Direct synthesis of magnesium borohydride},
author = {Ronnebro, Ewa Carin Ellinor and Severa, Godwin and Jensen, Craig M},
abstractNote = {A method is disclosed for directly preparing an alkaline earth metal borohydride, i.e. Mg(BH.sub.4).sub.2, from the alkaline earth metal boride MgB.sub.2 by hydrogenating the MgB.sub.2 at an elevated temperature and pressure. The boride may also be doped with small amounts of a metal chloride catalyst such as TiCl.sub.3 and/or NiCl.sub.2. The process provides for charging MgB.sub.2 with high pressure hydrogen above at least 70 MPa while simultaneously heating the material to about 350.degree. C. to about 400.degree. C. The method is relatively simple and inexpensive and provides a reversible hydride compound having a hydrogen capacity of at least 11 wt %.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2012},
month = {4}
}

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Works referenced in this record:

Formation of Ca(BH 4 ) 2 from Hydrogenation of CaH 2 +MgB 2 Composite
journal, February 2008