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Study of CO2 cyclic absorption stability of CaO-based sorbents derived from lime mud purified by sucrose method

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Abstract

Using lime mud (LM) purified by sucrose method, derived from paper-making industry, as calcium precursor, and using mineral rejects–bauxite-tailings (BTs) from aluminum production as dopant, the CaO-based sorbents for high-temperature CO2 capture were prepared. Effects of BTs content, precalcining time, and temperature on CO2 cyclic absorption stability were illustrated. The cyclic carbonation behavior was investigated in a thermogravimetric analyzer (TGA). Phase composition and morphologies were analyzed by XRD and SEM. The results reflected that the as-synthesized CaO-based sorbent doped with 10 wt% BTs showed a superior CO2 cyclic absorption–desorption conversion during multiple cycles, with conversion being >38 % after 50 cycles. Occurrence of Ca12Al14O33 phase during precalcination was probably responsible for the excellent CO2 cyclic stability.

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Acknowledgments

The National Natured Science Foundation of China (No. 2014FB129, 51104075, 51364023, and 31160146) provided financial supports for this work.

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Correspondence to ShaoYun Shan.

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The authors declare that they have no competing interests.

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Responsible editor: Philippe Garrigues

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Ma, A., Jia, Q., Su, H. et al. Study of CO2 cyclic absorption stability of CaO-based sorbents derived from lime mud purified by sucrose method. Environ Sci Pollut Res 23, 2530–2536 (2016). https://doi.org/10.1007/s11356-015-5477-4

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  • DOI: https://doi.org/10.1007/s11356-015-5477-4

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