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Lime-Based Sorbents for High-Temperature CO2 Capture—A Review of Sorbent Modification Methods
CanmetENERGY, Natural Resources Canada, 1 Haanel Drive, Ottawa, Ontario, K1A 1M1, Canada
* Author to whom correspondence should be addressed.
Received: 28 June 2010; in revised form: 19 July 2010 / Accepted: 31 July 2010 / Published: 6 August 2010
Abstract: This paper presents a review of the research on CO2 capture by lime-based looping cycles undertaken at CanmetENERGY’s (Ottawa, Canada) research laboratories. This is a new and very promising technology that may help in mitigation of global warming and climate change caused primarily by the use of fossil fuels. The intensity of the anticipated changes urgently requires solutions such as more cost-effective technologies for CO2 capture. This new technology is based on the use of lime-based sorbents in a dual fluidized bed combustion (FBC) reactor which contains a carbonator—a unit for CO2 capture, and a calciner—a unit for CaO regeneration. However, even though natural materials are cheap and abundant and very good candidates as solid CO2 carriers, their performance in a practical system still shows significant limitations. These limitations include rapid loss of activity during the capture cycles, which is a result of sintering, attrition, and consequent elutriation from FBC reactors. Therefore, research on sorbent performance is critical and this paper reviews some of the promising ways to overcome these shortcomings. It is shown that reactivation by steam/water, thermal pre-treatment, and doping simultaneously with sorbent reforming and pelletization are promising potential solutions to reduce the loss of activity of these sorbents over multiple cycles of use.
Keywords: CO2 capture; Ca looping cycles; thermal pre-treatment; hydration; pelletization
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MDPI and ACS Style
Manovic, V.; Anthony, E.J. Lime-Based Sorbents for High-Temperature CO2 Capture—A Review of Sorbent Modification Methods. Int. J. Environ. Res. Public Health 2010, 7, 3129-3140.
Manovic V, Anthony EJ. Lime-Based Sorbents for High-Temperature CO2 Capture—A Review of Sorbent Modification Methods. International Journal of Environmental Research and Public Health. 2010; 7(8):3129-3140.
Manovic, Vasilije; Anthony, Edward J. 2010. "Lime-Based Sorbents for High-Temperature CO2 Capture—A Review of Sorbent Modification Methods." Int. J. Environ. Res. Public Health 7, no. 8: 3129-3140.