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US 12,492,121 B2Granted
Conversion of ammonia to hydrogen and nitrogen using ammonia as a sweep gas
AssigneeSaudi Arabian Oil Company
InventorsMohammad Abdur Rakib, Stephen N. Paglieri, Osamah Siddiqui, Sai P. Katikaneni, Kunho Lee
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Abstract
The disclosure relates to systems and methods for the production of hydrogen (H2) from ammonia (NH3) in a membrane reactor that include using ammonia as a sweep gas. Ammonia is converted to hydrogen and nitrogen (N2), and the hydrogen is separated from the nitrogen and unreacted ammonia by passing the hydrogen through a hydrogen-permeable membrane while using ammonia as a sweep gas. The ammonia sweep gas can be separated from the permeated hydrogen and continuously recycled.
Claims19
A system, comprising:
- a reactor comprising a first portion and a second portion, the first and second portions separated by a hydrogen-permeable membrane;
- a first ammonia source configured to be in fluid communication with the first portion of the reactor;
- a second ammonia source configured to be in fluid communication with the second portion of reactor;
- and
- a heat source,
- wherein the system is configured so that, during use of the system:
- the first ammonia source supplies ammonia to the first portion of the reactor;
- the heat source heats the ammonia in the first portion of the reactor so that the ammonia in the first portion of the reactor is converted to hydrogen and nitrogen;
- the hydrogen passes through the hydrogen-permeable membrane and enters the second portion of the reactor;
- and
- the second ammonia source supplies ammonia to the second portion of the reactor in the form of a gas stream that removes the hydrogen from the second portion of the reactor.
8 more elements
A system, comprising:
- a reactor comprising a first portion and a second portion, the first and second portions separated by a hydrogen-permeable membrane;
- a first ammonia source configured to be in fluid communication with the first portion of the reactor;
- a second ammonia source configured to be in fluid communication with the second portion of reactor;
- a first cylinder comprising the hydrogen-permeable membrane;
- and
- a second cylinder that surrounds the first cylinder.
3 more elements
A system, comprising:
- a reactor comprising a first portion and a second portion, the first and second portions separated by a hydrogen-permeable membrane;
- a first ammonia source configured to be in fluid communication with the first portion of the reactor;
- a second ammonia source configured to be in fluid communication with the second portion of reactor;
- a cooler;
- a compressor;
- and
- a condenser in fluid communication with an outlet of the second portion of the reactor.
4 more elements
Dependencies are inferred from the claim text.