Investigation of SO2 Capture in a Circulating Fluidized Bed Carbonator of a Ca Looping Cycle
[EN] Calcium looping is a post-combustion CO2 capture technology that uses CaO as a regenerable solid sorbent. One potential advantage of this technology is that it allows flue gases to be treated with SO2, avoiding the need for a costly desulfurization step. In this work, we study the desulfurization capacity of a CFB carbonator reactor in a 30 kWth pilot plant that has been used to test CO2 and SO2 co-capture. A simple reactor model is applied to analyze the experimental results obtained and to study the effect of the main variables involved in the process: i.e. the circulation rates of solids and the inventory of active material in the CFB reactor. The results obtained have shown that SO2 capture efficiencies above 0.95 can be achieved in a CFB carbonator even when using a low inventory of active material in the bed. Extreme desulfurization (SO2 emissions below 5-10 ppmv) is thought to be achievable in large scale CFB carbonators designed to capture CO2 with CaO.
| Main Authors: | , , , , |
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| Format: | artículo biblioteca |
| Language: | English |
| Published: |
American Chemical Society
2013-01-14
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| Subjects: | Carbonator reactor, Carbon capture, SO2 capture, Ca looping, |
| Online Access: | http://hdl.handle.net/10261/74295 |
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| Summary: | [EN] Calcium looping is a post-combustion CO2 capture technology that uses CaO as a regenerable solid sorbent. One potential advantage of this technology is that it allows flue gases to be treated with SO2, avoiding the need for a costly desulfurization step. In this work, we study the desulfurization capacity of a CFB carbonator reactor in a 30 kWth pilot plant that has been used to test CO2 and SO2 co-capture. A simple reactor model is applied to analyze the experimental results obtained and to study the effect of the main variables involved in the process: i.e. the circulation rates of solids and the inventory of active material in the CFB reactor. The results obtained have shown that SO2 capture efficiencies above 0.95 can be achieved in a CFB carbonator even when using a low inventory of active material in the bed. Extreme desulfurization (SO2 emissions below 5-10 ppmv) is thought to be achievable in large scale CFB carbonators designed to capture CO2 with CaO. |
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