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Received April 30, 2015
Accepted August 28, 2015
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This is an Open-Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/bync/3.0) which permits
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Regeneration mechanism of CeO2-TiO2 sorbents for elemental mercury capture from syngas
State Key Laboratory of Clean Energy Utilization, Zhejiang University, Hangzhou 310027, P. R. China
zhoujs@zju.edu.cn
Korean Journal of Chemical Engineering, March 2016, 33(3), 1008-1013(6)
https://doi.org/10.1007/s11814-015-0185-9
https://doi.org/10.1007/s11814-015-0185-9
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Abstract
The characteristics of mercury desorption on spent CeO2-TiO2 (CeTi) sorbents were investigated to improve the cyclic regeneration removal activity. Mercury was significantly released in the form of elemental mercury at temperatures ranging from 250 to 280 oC. Mercury desorption had a significant correlation with regeneration temperature, but was independent of the heating rate and regeneration conditions. The optimal regeneration temperature was 500 oC. The CeTi sorbents could be easily restored by simple heating and exhibited superior activity over several capture-regeneration cycles. The amount of released mercury almost equaled the adsorbed mercury on the surface of the CeTi sorbent, indicating that most of the adsorbed mercury was released during the heating process.
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References
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