High Density Storage of Ammonia

• US 20100024403A1
• Filed: 10/13/2009
• Published: 02/04/2010
• Est. Priority Date: 02/03/2005
• Status: Active Grant

• Current Assignee: Amminex Emissions Technology A/S (Faurecia SA)
• Original Assignee: Amminex A/S
• Inventors: Sorensen, Rasmus Zink, Norskov, Jens Kehlet, Johannessen, Tue, Christensen, Claus Hviid, Quaade, Ulrich
• Granted Patent: US 7,964,163 B2
• Time in Patent Office: Days
• US Class Current: 60/295
• CPC Class Codes: B01D 53/56 Nitrogen oxides B01D53/60 takes precedence
• CPC Class Codes: B01D 53/79 Injecting reactants
• CPC Class Codes: B01D 53/8625 Nitrogen oxides
• CPC Class Codes: B01D 53/90 Injecting reactants
• CPC Class Codes: B01D 53/9409 Nitrogen oxides
• CPC Class Codes: B01J 20/046 containing halogens, e.g. halides
• CPC Class Codes: B01J 20/28011 Other properties, e.g. density, crush strength
• CPC Class Codes: B01J 20/28014 characterised by their form
• CPC Class Codes: B01J 20/2803 Sorbents comprising a binder, e.g. for forming aggregated, agglomerated or granulated products
• CPC Class Codes: B01J 20/28042 Shaped bodies; Monolithic structures
• CPC Class Codes: B01J 20/3042 Use of binding agents; addition of materials ameliorating the mechanical properties of the produced sorbent
• CPC Class Codes: C01C 1/006 making use of solid ammonia storage materials, e.g. complex ammine salts
• CPC Class Codes: C01F 11/24 Chlorides
• CPC Class Codes: C01G 3/14 Complexes with ammonia
• CPC Class Codes: F01N 2610/02 the substance being ammonia or urea
• CPC Class Codes: F01N 2610/06 the substance being in the gaseous form
• CPC Class Codes: F17C 11/00 Use of gas-solvents or gas-sorbents in vessels absorbing compositions for acetylene C10L3/04; absorbing compositions for hydrogen C01B3/0005
• CPC Class Codes: Y02E 60/36 Hydrogen production from non-carbon containing sources, e.g. by water electrolysis

Abstract

A solid ammonia storage and delivery material comprising an ammonia absorbing/desorbing solid material, said storage and delivery material having been compacted to a density above 50% of the theoretic skeleton density provides a solid ammonia storage material which is easy to produce and handle and has a very high density of stored ammonia which is readily released under controlled conditions even though the porosity of the material is very low, and which storage material is safe for storage and transport of ammonia without special safety measures.

Claims

1-40. -40. (canceled)

41. A system for delivery of ammonia to an ammonia consuming unit wherein the system comprises a discharge chamber for delivery of ammonia, said chamber comprising a compacted ammonia absorbing/desorbing solid material, means for heating the storage, and means for conveying the delivered ammonia from a storage chamber to one or more ammonia consuming units.

42. A system according to claim 41, wherein the ammonia consuming unit is a system wherein ammonia is used for catalytic removal of NO_x.

43. A system according to claim 42, wherein the catalytic removal of NO_x is a selective catalytic reduction of NO_x in an oxygen-containing exhaust gas of a combustion engine or a combustion process.

44. A system according to claim 41, wherein the ammonia consuming unit is an internal combustion engine fuelled by ammonia.

45. A system according to claim 41, wherein the ammonia consuming unit is a fuel cell capable of using ammonia as a fuel.

46. A system according to claim 41, wherein the ammonia consuming unit is a catalytic reactor decomposing the ammonia into hydrogen and nitrogen.

47. A system according to claim 46 further comprising means for conveying the hydrogen to one or more fuel cells using hydrogen as fuel.

48. A system according to claim 41 further comprising a feeding system for continuous feeding of solid ammonia storage and delivery material into the discharge chamber wherein ammonia is released by thermal desorption.

49. A system according to claim 41 further comprising:

a feeding system comprising a number of compartments where each compartment comprises one or more unit(s) of compacted solid ammonia storage and delivery material, which feeding system is adapted to releasing ammonia from the units sequentially by thermal desorption.

50. System according to claim 41 further comprising means for supplying ammonia to the storage chamber.