- Title
- A dynamic study on the impacts of CO₂ on SO₂ absorption into sodium based aqueous solutions in oxy-fuel scrubber
- Creator
- Liu, Dunyu; Wall, Terry; Liu, Yinghui
- Relation
- Australian Combustion Symposium . Proceedings of the Australian Combustion Symposium (Perth, W.A. 6-8 November, 2013)
- Relation
- http://www.anz-combustioninstitute.org/
- Publisher
- Combustion Institute, Australian & New Zealand Section
- Resource Type
- conference paper
- Date
- 2013
- Description
- Oxy-fuel combustion is an emerging technology to mitigate CO₂ emissions from power plants. Compared with other CO₂ capture technologies, gas impurities in oxy-fuel flue gas are highly concentrated, among which SO₂ is of concern. Dynamic transient experiments have been conducted in a semi-batch well stirred reactor (WSR) relevant to the conditions of the flue gas scrubbers operating at atmospheric pressure prior to CO₂ compression in oxy-fuel technology for CCS. SO₂ in N₂ as well as in CO₂ were considered. The initial solutions considered were NaOH (0.01M and 1 M), Na₂CO₃ (0.005M) and NaHCO₃ (0.01M). Analysis of the liquid solutions shows that significant amount of bicarbonate presents at pH values greater than 5.5, indicating a loss of the effectiveness of the sodium reagent. A practical discharge pH of the liquid discharge from the scrubber should be lower than 5.5 to minimize sodium loss; whereas at pH lower 4 absorption rate reduces. This operating range is consistent with the reported operating range of the scrubber used in the Vattenfall oxy-fuel pilot plant.
- Subject
- oxy-fuel; CO₂ quality; SO₂; scrubbing
- Identifier
- http://hdl.handle.net/1959.13/1316742
- Identifier
- uon:23255
- Identifier
- ISSN:1839-8170
- Language
- eng
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