Exergy analysis of the solar thermochemical cycle for capturing CO₂ from air
by Viktoria Nikulshina, Vladimir Nikulshin
International Journal of Exergy (IJEX), Vol. 7, No. 2, 2010

Abstract: This paper presents exergy analysis of the novel solar thermochemical cycle for CO₂ capture from ambient air. The exergy balance, the degree of the thermodynamic perfection, the influence coefficient and the exergy efficiency are determined for every element of the system. The proposed system has rather low exergy efficiency of 4.8%, mainly owing to the primary purpose of this system to capture CO₂ from air and not to produce energy. On the basis of exergetic analysis, possible ways of improving system performance are identified: increasing solar collector efficiency, pre-heating methane flow before the reforming reaction, recovering heat of the slaking process.

Online publication date: Tue, 26-Jan-2010

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