Metal ammine complexes for hydrogen storage

Christensen, Claus H.; Sørensen, Rasmus Zink; Johannessen, Tue; Quaade, Ulrich; Honkala, Karoliina; Elmøe, Tobias Dokkedal; Køhler, Rikke; Nørskov, Jens K.

doi:10.1039/b511589b

Cited by 172 publications

(136 citation statements)

References 23 publications

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“…The complex contains 9.1 wt.% hydrogen. Liberation of ammonia is endothermic and the enthalpy for the process is +43 kJ/mol H 2 (Christensen et al, 2005) or 17.8% of LHV. When the enthalpy for ammonia splitting is added, the overall minimum energy is +75 kJ/mol H 2 or 30.5 % of LHV.…”

Section: Ammonia (Nh3)mentioning

confidence: 99%

The Energy Efficiency of Different Hydrogen Storage Techniques

Jensen¹,

Li²,

Bjerrum³

2010

Energy Efficiency

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Section: Ammonia (Nh3)mentioning

confidence: 99%

The Energy Efficiency of Different Hydrogen Storage Techniques

Jensen¹,

Li²,

Bjerrum³

2010

Energy Efficiency

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“…One approach addressing the safety issue is to store ammonia as a complex with a salt, e.g., MgCl 2 . This idea was recently presented as hydrogen storage in tablet form (Christensen et al, 2005). Dry MgCl 2 can reversibly take up 6 molecules of ammonia, and the vapour pressure of ammonia becomes many orders of magnitude smaller.…”

Section: Ammonia (Nh3)mentioning

confidence: 99%

The energy efficiency of onboard hydrogen storage

Jensen

Vestbø

et al. 2007

Journal of Alloys and Compounds

118

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“…Christensen et al revealed that Mg(NH 3 ) 6 Cl 2 could store 9.1 mass% of hydrogen in the form of ammonia with a three-step decomposition reaction as: 24) Mg(NH 3 ) 6 Cl 2 ! Mg(NH 3 ) 2 Cl 2 þ 4NH 3…”

Section: Introductionmentioning

confidence: 99%

“…24) For use as a potential hydrogen carrier, ammonia must first be decomposed into nitrogen and hydrogen. However, hydrogen is delivered only at temperature above 300…”

Section: Introductionmentioning

confidence: 99%

Hydrogen Storage Properties of the Mg(NH3)6Cl2-LiH Combined System

Liu

Luo

et al. 2011

Mater. Trans.

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Metal ammine complexes (MACs) were recently regarded as one of promising materials for reversible hydrogen storage due to their high hydrogen content. In this work, a first attempt is conducted to elucidate the hydrogen storage reversibility by combining Mg(NH 3 ) 6 Cl 2 with LiH. It is found that hydrogen is gradually evolved from the combined system during ball milling. After 24 h of milling, approximate 3.5 mass% of hydrogen, equivalent to 6 mol of H 2 molecules, is released from the Mg(NH 3 ) 6 Cl 2 -18LiH mixture. Additional 3.4 mass% of hydrogen is further desorbed from the combined system milled for 24 h with a two-step reaction in heating process. Totally $ 12 mol of H 2 molecules are librated from the Mg(NH 3 ) 6 Cl 2 -18LiH mixture along with the formation and consumption of Mg(NH 2 ) 2 and LiNH 2 in the ball milling and subsequent heating process. The resultant products consist of Li 2 Mg(NH) 2 , Li 2 NH, LiH and LiCl after dehydrogenation at 310 C. Further hydrogenation experiment indicates that $ 6 mol of H 2 molecules are reversibly stored in the Mg(NH 3 ) 6 Cl 2 -12LiH mixture.

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Metal ammine complexes for hydrogen storage

Cited by 172 publications

References 23 publications

The Energy Efficiency of Different Hydrogen Storage Techniques

The Energy Efficiency of Different Hydrogen Storage Techniques

The energy efficiency of onboard hydrogen storage

Hydrogen Storage Properties of the Mg(NH<SUB>3</SUB>)<SUB>6</SUB>Cl<SUB>2</SUB>-LiH Combined System

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