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Preparation and performance of potassium-based sorbent using SnO2 for post-combustion CO2 capture

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Abstract

Potassium-based sorbents using γ-Al2O3 or TiO2 as a support or an additive material have disadvantages in terms of their thermal stability and cyclic CO2 capture. To overcome the shortcomings of these sorbents, a novel potassium-based sorbent (KSnI30) using SnO2 was developed in this study. The KSnI30 sorbent formed only K2CO3 and SnO2 phases without any inactive alloy species even after calcination at high temperatures (500–700 °C), indicating the good thermal stability of the KSnI30 sorbent regardless of the calcination temperature. Furthermore, the KSnI30 sorbent has an excellent regeneration property (above 98 %), as well as high CO2 capture capacities (89–94 mg CO2/g sorbent). Its excellent regeneration property is due to the formation of a KHCO3 phase without by-products during CO2 sorption. These results of the present study demonstrate that the SnO2 shows promise as a new support or an additive material to replace TiO2 and γ-Al2O3 in the preparation of a regenerable potassium-based sorbent for post-combustion CO2 capture with good thermal stability and excellent regeneration property.

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Acknowledgments

This work was supported by the Energy Efficiency & Resources Core Technology Program of the Korea Institute of Energy Technology Evaluation and Planning (KETEP), granted financial resource from the Ministry of Trade, Industry & Energy, Republic of Korea (20142010201830). We acknowledge the financial support by grants from Korea CCS R&D Center, funded by the Ministry of Education, Science and Technology of Korean government (NRF-2014M1A8A1049249).

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    Authors and Affiliations

    1. Department of Chemical Engineering, Kyungpook National University, Daegu, 41566, Korea

      Min Sun Cho, Ho Jin Chae & Jae Chang Kim

    2. Research Institute of Advanced Energy Technology, Kyungpook National University, Daegu, 41566, Korea

      Soo Chool Lee

    3. Korea Electric Power Research Institute, Daejon, 34056, Korea

      Joong Beom Lee

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    1. Min Sun Cho
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    2. Soo Chool Lee
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    3. Ho Jin Chae
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    5. Jae Chang Kim
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    Correspondence to Jae Chang Kim.

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    Min Sun Cho and Soo Chool Lee have contributed equally to this study.

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    Cho, M.S., Lee, S.C., Chae, H.J. et al. Preparation and performance of potassium-based sorbent using SnO2 for post-combustion CO2 capture. Adsorption 22, 1119–1127 (2016). https://doi.org/10.1007/s10450-016-9835-4

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