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Calcium Looping Technology Using Improved Stability Nanostructured Sorbent for Cyclic CO2 Capture

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Cleaner Combustion and Sustainable World (ISCC 2011)

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Abstract

One of the post-combustion CO2 capture technologies that have sufficiently been proved to be the best candidates for practical large scale post-combustion application is the calcium looping cycle. However, the CO2 capture capacity of a calcium-based sorbent derived from natural limestone decays through long-term cyclic utilization; thus, the development of novel sorbents to achieve a high CO2 capture capacity is an critical challenge for the calcium looping cycle technology. In this paper, we report the preparation and character of a new calcium-based sorbent produced via the combustion of a dry gel. The results show that the novel calcium-based sorbent has a much higher residual carbonation conversion as well as a better performance of anti-sintering when compared with the calcium-based sorbent derived from commercial micrometer grade CaCO3 and nanometer grade CaCO3. It is reasonable to propose that the different final carbonation performances are induced by their different pore structures and BET surface areas rather than by different particle sizes. Compared with the commercial nano CaO, the morphology of the new sorbent shows a more rough porous appearance with hollow nanostructure. During carbonation, CO2 diffused more easily through the hollow structure than through a solid structure to reach the unreacted CaO. Besides, there is less chance for the hollow nanostructured particles to be merged together during the high temperature reactions.

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Acknowledgments

The authors acknowledge the financial supports of National Basic Research Program of China (No.2011CB707301), and the National Natural Science Foundation of China (No.50936001, 51021065). The authors are also grateful to Analytical and Testing Center of Huazhong University of Science and Technology for FSEM measurements.

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Authors and Affiliations

  1. State Key Laboratory of Coal Combustion, Huazhong University of Science and Technology, Wuhan, 430074, China

    Cong Luo, Ying Zheng, Ning Ding & Chu-guang Zheng

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  1. Cong Luo
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  2. Ying Zheng
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  3. Ning Ding
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  4. Chu-guang Zheng
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Corresponding author

Correspondence to Ying Zheng .

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Editors and Affiliations

  1. Institute of Thermal Engineering, Tsinghua University, Beijing, China, People's Republic

    Haiying Qi

  2. Institute of Thermal Engineering, Tsinghua University, Beijing, China, People's Republic

    Bo Zhao

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Luo, C., Zheng, Y., Ding, N., Zheng, Cg. (2013). Calcium Looping Technology Using Improved Stability Nanostructured Sorbent for Cyclic CO2 Capture. In: Qi, H., Zhao, B. (eds) Cleaner Combustion and Sustainable World. ISCC 2011. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-30445-3_154

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  • DOI: https://doi.org/10.1007/978-3-642-30445-3_154

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  • Publisher Name: Springer, Berlin, Heidelberg

  • Print ISBN: 978-3-642-30444-6

  • Online ISBN: 978-3-642-30445-3

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