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US 9,670,063 B2Granted
Method for producing hydrogen from ammonia
AssigneeThe Science and Technology Facilities Council
InventorsWilliam I. F. David, Martin Owen Jones
Life of this patent
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Abstract
The present invention relates to a method of producing hydrogen from ammonia, and in particular a method of producing hydrogen from ammonia by reacting it with a Group I metal, particularly with sodium, for use in a fuel cell and/or in a prime mover. The method may be carried out in-situ in a vehicle. The invention also relates to an apparatus for producing hydrogen from ammonia.
Claims16
A method of producing hydrogen from ammonia the method comprising:
- (i) providing ammonia as a fuel source;
- (ii) introducing ammonia into a reactor and reacting at least some of the ammonia with a metal and/or a metal-containing-compound to form at least one intermediate and optionally hydrogen;
- (iii) decomposing at least some of the intermediate produced in step (ii) to form hydrogen and to regenerate the metal and/or the metal-containing-compound;
- (iv) removing at least some of the hydrogen formed in step (iii);
- and
- (v) reacting the regenerated metal and/or the regenerated metal-containing-compound with further ammonia;
- wherein the metal and/or the metal-containing-compound comprises or is selected from the group consisting of Group I metals;
- wherein the Group I metal is selected from the group consisting of Na, Li, K, Rb, Cs, alloys and mixtures of two or more thereof;
- wherein the reaction of the at least some ammonia with the metal and/or the metal-containing-compound to form the at least one intermediate is carried out at a temperature in the range of from 450 to 800° C. and at a pressure of 0.01 to 20 MPa.
6 more elements
A method of producing hydrogen from ammonia the method comprising:
- (i) providing ammonia as a fuel source;
- (ii) introducing ammonia into a reactor and reacting at least some of the ammonia with a metal and/or a metal-containing-compound to form at least one intermediate and optionally hydrogen;
- (iii) decomposing at least some of the intermediate produced in step (ii) to form hydrogen and to regenerate the metal and/or the metal-containing-compound;
- (iv) removing at least some of the hydrogen formed in step (iii);
- and
- (v) reacting the regenerated metal and/or the regenerated metal-containing-compound with further ammonia;
- and
- wherein the reaction of the at least some ammonia with a metal and/or metal containing compound to form at least one intermediate is carried out in the presence of a catalyst;
- and
- wherein the catalyst is selected from the group consisting of transition metal calogenides, lanthanide metal calogenides, transition metal halides, lanthanide metal halides, transition metal pnictides, lanthanide metal pnictides, transition metal tetrels, lanthanide metal tetrels and mixtures of two or more thereof.
7 more elements
Dependencies are inferred from the claim text.