Kinetic evaluation of lime for medium-temperature desulfurization in oxy-fuel conditions by dry sorbent injection
(2019) In Energies 12(14).- Abstract
With increasing emphasis on the control of greenhouse gases, power plants may move towards oxy-fuel technologies rather than air-fired plants. This move leads to a change in the feed to the desulfurization unit, which also needs to be adapted along with the power plant. Most existing plants already have functioning desulfurization units, which need to be retrofitted for the new conditions. In the present study, three different limes have been examined as sorbents for sulfur capture in oxy-fuel conditions with varying residence times at medium temperature (150–450 ◦C). Parameters indicative of the kinetics and competition between SO2 and CO2, like SO2 breakthrough time, total lime conversion,... (More)
With increasing emphasis on the control of greenhouse gases, power plants may move towards oxy-fuel technologies rather than air-fired plants. This move leads to a change in the feed to the desulfurization unit, which also needs to be adapted along with the power plant. Most existing plants already have functioning desulfurization units, which need to be retrofitted for the new conditions. In the present study, three different limes have been examined as sorbents for sulfur capture in oxy-fuel conditions with varying residence times at medium temperature (150–450 ◦C). Parameters indicative of the kinetics and competition between SO2 and CO2, like SO2 breakthrough time, total lime conversion, yield for sulfur capture and sulfur selectivity have been evaluated. The results of this study lead to the recommendation that medium temperature desulfurization should be used for moderate SO2 capture, in combination with already existing sulfur capture systems. The effects of CO2 and water vapor have also been analyzed. In addition, the performance of the unit irrespective of temperature strongly depends on the lime type. In addition, absence of water vapor strongly favored the desulfurization process when there was high concentration of CO2.
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- author
- Sanku, Meher G. LU ; Karlsson, Hanna K. LU ; Hulteberg, Christian LU ; Wang, Wuyin LU ; Stallmann, Olaf and Karlsson, Hans T. LU
- organization
- publishing date
- 2019-07-10
- type
- Contribution to journal
- publication status
- published
- subject
- keywords
- Desulfurization, Dry sorbent injection, Lime, Medium temperature, Oxyfuel
- in
- Energies
- volume
- 12
- issue
- 14
- article number
- 2645
- publisher
- MDPI AG
- external identifiers
-
- scopus:85068856105
- ISSN
- 1996-1073
- DOI
- 10.3390/en12142645
- language
- English
- LU publication?
- yes
- id
- d1030993-dd98-41ff-bedf-653672999aae
- date added to LUP
- 2019-07-24 15:24:04
- date last changed
- 2023-10-07 14:37:21
@article{d1030993-dd98-41ff-bedf-653672999aae, abstract = {{<p>With increasing emphasis on the control of greenhouse gases, power plants may move towards oxy-fuel technologies rather than air-fired plants. This move leads to a change in the feed to the desulfurization unit, which also needs to be adapted along with the power plant. Most existing plants already have functioning desulfurization units, which need to be retrofitted for the new conditions. In the present study, three different limes have been examined as sorbents for sulfur capture in oxy-fuel conditions with varying residence times at medium temperature (150–450 <sup>◦</sup>C). Parameters indicative of the kinetics and competition between SO<sub>2</sub> and CO<sub>2</sub>, like SO<sub>2</sub> breakthrough time, total lime conversion, yield for sulfur capture and sulfur selectivity have been evaluated. The results of this study lead to the recommendation that medium temperature desulfurization should be used for moderate SO<sub>2</sub> capture, in combination with already existing sulfur capture systems. The effects of CO<sub>2</sub> and water vapor have also been analyzed. In addition, the performance of the unit irrespective of temperature strongly depends on the lime type. In addition, absence of water vapor strongly favored the desulfurization process when there was high concentration of CO<sub>2</sub>.</p>}}, author = {{Sanku, Meher G. and Karlsson, Hanna K. and Hulteberg, Christian and Wang, Wuyin and Stallmann, Olaf and Karlsson, Hans T.}}, issn = {{1996-1073}}, keywords = {{Desulfurization; Dry sorbent injection; Lime; Medium temperature; Oxyfuel}}, language = {{eng}}, month = {{07}}, number = {{14}}, publisher = {{MDPI AG}}, series = {{Energies}}, title = {{Kinetic evaluation of lime for medium-temperature desulfurization in oxy-fuel conditions by dry sorbent injection}}, url = {{http://dx.doi.org/10.3390/en12142645}}, doi = {{10.3390/en12142645}}, volume = {{12}}, year = {{2019}}, }