Calcium sulfate looping cycles for sour gas combustion and electricity production
AssigneeSaudi Arabian Oil Company
InventorsAli Hoteit, Mourad Younes
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Abstract
A calcium looping combustion process for sour gas combustion comprising a system that includes several reaction zones. The system is configured to provide oxygen transfer media production, generation of a syngas product stream, and in-situ H2S removal from the sour gas. The system is also configured such that the calcium-based transfer media and the calcium-based oxygen carrier are reproduced via reactions in another reaction zone, and recirculated in the system.
Claims28
A process for in-situ removal of sulfur, oxygen transfer media production, and sour gas combustion using calcium looping combustion while producing a product stream, comprising the steps of:
- calcining CaCO3 in an air reactor to produce a calcium-based transfer media;
- transferring the calcium-based transfer media from the air reactor to a fuel reactor;
- delivering sour gas into the fuel reactor;
- reducing the calcium-based transfer media disposed within the fuel reactor to provide gas-phase oxygen;
- oxidizing the reduced calcium-based transfer media with air in the air reactor to produce a calcium-based oxygen transfer media;
- delivering the calcium-based oxygen transfer media from the air reactor to a riser;
- transferring sour gas without H2S from the fuel reactor to the riser;
- combusting the sour gas without H2S within the riser to produce the product stream which includes the reduced calcium-based transfer media;
- removing the reduced calcium-based transfer media from the product stream;
- re-oxidizing the reduced calcium-based transfer media with air in the air reactor to produce the calcium-based oxygen transfer media;
- and
- delivering the calcium-based oxygen transfer media back to the riser.
A process for in-situ removal of sulfur, oxygen transfer media production, and sour gas combustion using calcium looping combustion while producing a product stream, comprising the steps of:
- calcining CaCO3 in an air reactor to produce a calcium-based transfer media;
- transferring the calcium-based transfer media from the air reactor to a fuel reactor;
- delivering sour gas into the fuel reactor such that the sour gas reacts with the calcium-based transfer media and the calcium-based transfer media is reduced;
- and
- injecting a calcium-based oxygen transfer media into a riser that is in fluid communication with the fuel reactor, whereby sour gas without H2S is combusted within the riser to produce the product stream which includes the reduced calcium-based transfer media;
- wherein the step of injecting the calcium-based oxygen transfer media comprises the step of oxidizing the reduced calcium-based transfer media with air in the air reactor to produce the calcium-based oxygen transfer media which is then delivered to the riser.
A process for in-situ removal of sulfur, calcium-based oxygen transfer media production, and sour gas combustion using calcium looping combustion while producing a product stream of syngas, comprising the steps of:
- calcining CaCO3 in an air reactor to produce a calcium-based transfer media;
- transferring the calcium-based transfer media from the air reactor to a fuel reactor;
- delivering sour gas into the fuel reactor;
- reducing the calcium-based transfer media disposed within the fuel reactor;
- delivering the reduced calcium-based transfer media from the fuel reactor to the air reactor;
- oxidizing the reduced calcium-based transfer media with air in the air reactor to produce a calcium-based oxygen transfer media;
- delivering the calcium-based oxygen transfer media from the air reactor to a riser;
- transferring sour gas without H2S from the fuel reactor to the riser;
- combusting the sour gas without H2S within the riser to produce the syngas product stream which includes the reduced calcium-based transfer media;
- removing the reduced calcium-based transfer media from the product stream;
- re-oxidizing the reduced calcium-based transfer media with air in the air reactor to produce the calcium-based oxygen transfer media;
- and
- delivering the calcium-based oxygen transfer media back to the riser.
Dependencies are inferred from the claim text.