Calcium Sulfate Looping Cycles for Sour Gas Combustion and Electricity Production

摘要

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.

主权项

1. 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 the clean sour gas (without H2S) from the fuel reactor to the riser; combusting the sour gas 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.