 CO2 capture from air and co-production of H2 via the Ca(OH)2–CaCO3 cycle using concentrated solar power–Thermodynamic analysisV. Nikulshina, D. Hirsch, M. Mazzotti and A. Steinfeld Energy, 2006, vol. 31, issue 12, 1715-1725 Abstract: The thermodynamics of a solar thermochemical cycle for the capture of CO2 from air are analyzed. The cycle encompasses 3 reactors: an aerosol-type carbonator for capturing CO2 from air using a spray of Ca(OH)2 aqueous solution, a solar calciner for thermally decomposing CaCO3 into CaO using concentrated solar energy, and a conventional slaker for regenerating Ca(OH)2. Two approaches are examined: (1) a closed-material cycle that delivers pure CO2; and (2) an open-material cycle that, additionally, co-produces hydrogen. The 2nd approach features the same components as those of the closed-material cycle, except that the calciner co-produces CaO and syngas by the combined CaCO3-decomposion and CH4-reforming processes, and syngas is further processed to separate streams of H2 and CO2. Its thermodynamic efficiency, defined as the ratio of ΔG298K∘|H2+0.5O2→H2O for the H2 produced to the thermal energy input (solar energy+heating value of CH4) is 22.7%. The solar chemical reactor technology for the calcination and for the combined calcination-reforming is presented. Keywords: CO2 capture; Hydrogen; Carbonation; Calcination; Methane reforming (search for similar items in EconPapers) Downloads: (external link) Related works: Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text Persistent link: https://EconPapers.repec.org/RePEc:eee:energy:v:31:y:2006:i:12:p:1715-1725 DOI: 10.1016/j.energy.2005.09.014 Access Statistics for this article Energy is currently edited by Henrik Lund and Mark J. Kaiser More articles in Energy from Elsevier |
Is your work missing from RePEc? Here is how to contribute.
Questions or problems? Check the EconPapers FAQ or send mail to .
EconPapers is hosted by the
School of Business at Örebro University.