Natural Calcium‐Based Sorbents Doped with Sea Salt for Cyclic CO2 Capture |
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Authors: | Yongqing Xu Cong Luo Ying Zheng Haoran Ding Dong Zhou Liqi Zhang |
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Affiliation: | Huazhong University of Science and Technology, State Key Laboratory of Coal Combustion, School of Energy and Power Engineering, Hubei, China |
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Abstract: | The calcium‐looping process for post‐combustion carbon dioxide capture, an economically and technically feasible method suitable for large‐scale use, has recently gained much attention. However, the capture capacity of calcium‐based sorbents rapidly decreases after only a few cycles. Herein, calcium‐based sorbents with enhanced cyclic CO2‐capture capacity have been derived from cheap, natural raw materials by using a simple impregnation method. Limestone and shells were used as the calcium‐based raw materials, with sea salt as dopant. Modified limestone had the highest CO2‐capture capacity after multiple carbonation‐calcination cycles. Sea‐salt‐doped sorbent showed a relatively stable porous surface during cycles, which resulted in a higher CO2‐capture capacity. |
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Keywords: | Adsorbents Calcium compounds Calcium looping Carbon dioxide capture Doping |
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