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Oxycombustion in pulverized coal-fired boiler: a promising technology for CO2 capture
| Content Provider | CiteSeerX |
|---|---|
| Author | Varagani, Rajani Châtel-Pélage, Fabienne Pr, Pavol Lu, Yongqi Chen, Scott Rostam-Abadi, Massoud Farzan, Hamid Vecci, Stanley J. Bose, Arun C. |
| Abstract | A promising technology that enables CO2 capture from pulverized coal-fired power plants is described. The technology involves the replacement of the combustion air by pure oxygen diluted with recirculated flue gases, and is referred to as oxycombustion process. The resulting CO2/O2 oxidizer provides a high flexibility for temperature and flowrate control inside the boiler. Therefore, both retrofit and new boiler applications are envisioned. The economics of the oxycombustion process have been assessed and compared to that of the same capacity air-blown coal-fired boiler equipped with amine (MEA) scrubber for carbon capture. Both capture technologies result in increased cost of electricity. However, this increase is expected to be at least 30 % lower using O2/CO2 technology than using MEA system. The oxycombustion process leads to approximately $20/ton CO2 avoided, while MEA process requires more than $40/ton CO2. The main results of experimental tests performed on a pilot-scale boiler are also presented. Low-sulfur sub-bituminous coal was burned and the reported results highlight the characteristics of oxygen-fired mode versus air-fired mode. 70 % NOx emission reduction has been observed, and emission level as low as 0.08 lb / 106 Btu has been measured. The flue gas flow rate has been |
| File Format | |
| Access Restriction | Open |
| Subject Keyword | Co2 Capture Promising Technology Oxycombustion Process Pulverized Coal-fired Boiler Ton Co2 Increased Cost Capacity Air-blown Coal-fired Boiler Recirculated Flue Gas Main Result Flue Gas Flow Rate High Flexibility Capture Technology Combustion Air Carbon Capture Co2 O2 Oxidizer Air-fired Mode Experimental Test Emission Level Mea System Coal-fired Power Plant Low-sulfur Sub-bituminous Coal Mea Process O2 Co2 Technology New Boiler Application Nox Emission Reduction Pilot-scale Boiler Pure Oxygen Oxygen-fired Mode |
| Content Type | Text |
