Pressure effects on the carbonation of MeO (Me=Co, Mn, Pb, Zn) for thermochemical energy storage

Author(s)
Georg Gravogl, Christian Knoll, Werner Artner, Jan M. Welch, Elisabeth Eitenberger, Gernot Friedbacher, Michael Harasek, Klaudia Hradil, Andreas Werner, Peter Weinberger, Danny Müller, Ronald Miletich
Abstract

Metal carbonates are attractive materials for combining carbon capture and thermochemical energy storage. Carbonate materials feature high decomposition and formation temperatures and may be considered in applications in combination with concentrating solar power. In the present study in-situ P-XRD carbonation (1-8 bar CO2) and reactor-based experiments (1-55 bar CO2) are combined focusing on the effect of elevated CO2 pressures on carbonation of metal oxides. Carbonation of MnO and PbO at CO2 pressures between 8 and 50 bar in the presence of moisture resulted in reaction with CO2, forming the corresponding carbonates at notably lower temperatures than under dry CO2 atmosphere of 1 bar. This enables the application of metal oxide/metal carbonate reaction couples for energy storage at temperatures between 25 and 500 °C. Based on the reversible carbonation/decarbonation of PbO under varying CO2 pressures, an isothermal storage cycle between PbO/ PbCO3·2PbO, triggered by changing the CO2 pressure between 2 and 8 bar, was developed.

Organisation(s)
Department of Mineralogy and Crystallography
External organisation(s)
Technische Universität Wien
Journal
Applied Energy
Volume
252
No. of pages
8
ISSN
0306-2619
DOI
https://doi.org/10.1016/j.apenergy.2019.113451
Publication date
06-2019
Peer reviewed
Yes
Austrian Fields of Science 2012
104021 Structural chemistry, 104011 Materials chemistry, 105113 Crystallography
Keywords
ASJC Scopus subject areas
Mechanical Engineering, Energy(all), Management, Monitoring, Policy and Law, Building and Construction
Portal url
https://ucris.univie.ac.at/portal/en/publications/pressure-effects-on-the-carbonation-of-meo-meco-mn-pb-zn-for-thermochemical-energy-storage(0e8df4a7-689c-42df-977f-e35403144bc8).html