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Issue 6, 2012
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Chemical looping processes for CO2 capture and carbonaceous fuel conversion – prospect and opportunity

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Abstract

Chemical looping processes offer a compelling way for effective and viable carbonaceous fuel conversion into clean energy carriers. The uniqueness of chemical looping processes includes their capability of low cost in situ carbon capture, high efficiency energy conversion scheme, and advanced compatibility with state-of-the-art technologies. Based on the different functions of looping particles, two types of chemical looping technologies and associated processes have been developed. Type I chemical looping systems utilize oxygen carrier particles to perform the reduction–oxidation cycles, while Type II chemical looping systems utilize CO2 carrier particles to conduct carbonation–calcination cycles. The exergy analysis indicates that the chemical looping strategy has the potential to improve fossil fuel conversion schemes. Chemical looping particle performance and looping reactor engineering are the key drivers to the success of chemical looping process development. In this work, the desired particle characterization and recent progress in mechanism studies are generalized, which is followed by a discussion on the looping reactor design. This perspective also illustrates various chemical looping processes for combustion and gasification applications. It shows that both Type I and Type II looping processes have great potentials for flexible and efficient production of electricity, hydrogen and liquid fuels.

Graphical abstract: Chemical looping processes for CO2 capture and carbonaceous fuel conversion – prospect and opportunity

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Publication details

The article was received on 16 Nov 2011, accepted on 21 Mar 2012 and first published on 21 Mar 2012


Article type: Review Article
DOI: 10.1039/C2EE03198A
Citation: Energy Environ. Sci., 2012,5, 7254-7280
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    Chemical looping processes for CO2 capture and carbonaceous fuel conversion – prospect and opportunity

    L. Fan, L. Zeng, W. Wang and S. Luo, Energy Environ. Sci., 2012, 5, 7254
    DOI: 10.1039/C2EE03198A

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