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Carbon Sequestration
Capture Project Descriptions
Greenhouse Gas Emissions Control by Oxygen Firing in
Circulating Fluidized-Bed Boilers
Project # 42205
Primary Performing Organization
Alstom Power Inc.
Burning fuel in enriched air or pure oxygen can produce a pure stream of carbon dioxide (CO2), which provides great potential to reduce CO2 separation and capture costs during combustion. This project is conducting economic evaluations of the recovery of CO2 using a newly constructed circulating fluidized-bed (CFB) combustor while burning coal, petroleum coke, or biomass fuel with a mixture of oxygen and recycled flue gas, instead of air. See graphic.
Project objectives address two phases and a testing methodology:
- The Phase I objective is to determine which of the new concepts in a CFB are technically feasible and have the potential to reduce the target cost of “avoided” carbon (reducing carbon emissions).
- Petroleum coke and coal samples will be tested in a 4-inch fluidized-bed combustion reactor to determine the potential to combine the gaseous and unburned carbon emissions and ash during combustion in oxygen-rich environments.
- The Phase II objective is to generate a refined technical and economic evaluation of the most promising concept for reducing CO2 mitigation costs, based on data from proof-of-concept testing of Phase I.
The comparison of the several different technologies will target the most economical gas clean-up configuration. Key results, using anywhere from 21% to 70% oxygen, are showing changes in efficiency, equipment costs, costs of electricity, and CO2 mitigation costs. Oxygen firing also has proven to lower NOx emissions.
Contact:
Project Manager: Timothy Fout, timothy.fout@netl.doe.gov
Related Papers and Publications:
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