Calcium Looping: On the Positive Influence of SO2 and the Negative Influence of H2O on CO2 Capture by Metamorphosed Limestone-Derived Sorbents
KAUST DepartmentClean Combustion Research Center
Physical Science and Engineering (PSE) Division
Chemical Engineering Program
KAUST Catalysis Center (KCC)
Mechanical Engineering Program
Permanent link to this recordhttp://hdl.handle.net/10754/666396
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AbstractThe CO2 capture performance of sorbents derived from three distinct limestones, including a metamorphosed limestone, is studied under conditions relevant for calcium looping CO2 capture from power plant flue gas. The combined and individual influence of flue gas H2O and SO2 content, the influence of textural changes caused by sequential calcination/carbonation cycles, and the impact of CaSO4 accumulation on the sorbents’ capture performance were examined using bubbling fluidized bed reactor systems. The metamorphosed limestone-derived sorbents exhibit atypical capture behavior: flue gas H2O negatively influences CO2 capture performance, while limited sulfation can positively influence CO2 capture, with space time significantly impacting CO2 and SO2 co-capture performance. The morphological characteristics influencing sorbents’ capture behavior were examined using imaging and material characterization tools, and a detailed discussion is presented. This insight into the morphology responsible for metamorphosed limestone-derived sorbent’s anomalous capture behavior can guide future sorbent selection and design efforts.
CitationHomsy, S. L., Moreno, J., Dikhtiarenko, A., Gascon, J., & Dibble, R. W. (2020). Calcium Looping: On the Positive Influence of SO2 and the Negative Influence of H2O on CO2 Capture by Metamorphosed Limestone-Derived Sorbents. ACS Omega. doi:10.1021/acsomega.0c04157
SponsorsThe research reported in this publication was supported by funding from the King Abdullah University of Science and Technology (KAUST). Figure 13 was created by Ivan Gromicho, Scientific Illustrator at King Abdullah University of Science and Technology (KAUST). Thank you, Ivan.
PublisherAmerican Chemical Society (ACS)