Biomass combustion with in situ CO2 capture with CaO. I. process description and economics
A novel concept is proposed to capture CO2 from biomass, burned in a circulating fluidized bed at a sufficiently low temperature (below 700 °C) to allow capture "in situ" by CaO. This step is followed by the calcination of CaCO3 in an interconnected oxy-fuel combustor that delivers a concentrated stream of CO2 suitable for permanent geological storage. A conceptual design and cost estimation exercise is presented and compared with other similar power plant schemes based on biomass and fossil fuels. A sensitivity analysis of the main cost variables reveals that the concept proposed is competitive against other lowcarbon systems for lower values of Green Certificates and higher values of a carbon tax. The process could have long-term applications for large-scale biomass-fired systems and medium-term applications in helping large-scale power plants with CO2 capture and storage to meet the target of zero emissions by taking advantage of the negative emissions achieved from CO2 captured from biomass. A second part of this work (see the next article in this issue) demonstrates the concept in a 30 kW circulating fluidizedbed test facility. © 2011 American Chemical Society.
| Main Authors: | , , |
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| Format: | artículo biblioteca |
| Published: |
American Chemical Society
2011
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| Subjects: | CO2 capture, Carbonation, Biomass combustion, Negative emissions, Climate change, |
| Online Access: | http://hdl.handle.net/10261/221298 |
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| Summary: | A novel concept is proposed to capture CO2 from biomass, burned in a circulating fluidized bed at a sufficiently low temperature (below 700 °C) to allow capture "in situ" by CaO. This step is followed by the calcination of CaCO3 in an interconnected oxy-fuel combustor that delivers a concentrated stream of CO2 suitable for permanent geological storage. A conceptual design and cost estimation exercise is presented and compared with other similar power plant schemes based on biomass and fossil fuels. A sensitivity analysis of the main cost variables reveals that the concept proposed is competitive against other lowcarbon systems for lower values of Green Certificates and higher values of a carbon tax. The process could have long-term applications for large-scale biomass-fired systems and medium-term applications in helping large-scale power plants with CO2 capture and storage to meet the target of zero emissions by taking advantage of the negative emissions achieved from CO2 captured from biomass. A second part of this work (see the next article in this issue) demonstrates the concept in a 30 kW circulating fluidizedbed test facility. © 2011 American Chemical Society. |
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