Thermochemical CO2 splitting via redox cycling of ceria reticulated foam structures with dual-scale porosities

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Thermochemical CO2 splitting via redox cycling of ceria reticulated foam structures with dual-scale porosities.

Efficient heat transfer of concentrated solar energy and rapid chemical kinetics are desired characteristics of solar thermochemical redox cycles for splitting CO2. We have fabricated reticulated porous ceramic (foam-type) structures made of ceria with dual-scale porosity in the millimeter and micrometer ranges. The larger void size range, with dmean = 2.5 mm and porosity = 0.76-0.82, enables v...

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Solar-Driven Thermochemical Splitting of CO2 and In Situ Separation of CO and O2 across a Ceria Redox Membrane Reactor

Splitting CO2 with a thermochemical redox cycle utilizes the entire solar spectrum and provides a favorable path to the synthesis of solar fuels at high rates and efficiencies. However, the temperature/pressure swing commonly applied between reduction and oxidation steps incurs irreversible energy losses and severe material stresses. Here, we experimentally demonstrate for the first time the si...

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Splitting CO2 with a ceria‐based redox cycle in a solar‐driven thermogravimetric analyzer

Thermochemical splitting of CO2 via a ceria-based redox cycle was performed in a solar-driven thermogravimetric analyzer. Overall reaction rates, including heat and mass transport, were determined under concentrated irradiation mimicking realistic operation of solar reactors. Reticulated porous ceramic (RPC) structures and fibers made of undoped and Zr4+-doped CeO2, were endothermally reduced u...

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Morphological Characterization and Effective Thermal Conductivity of Dual-Scale Reticulated Porous Structures

Reticulated porous ceramic (RPC) made of ceria are promising structures used in solar thermochemical redox cycles for splitting CO₂ and H₂O. They feature dual-scale porosity with mm-size pores for effective radiative heat transfer during reduction and µm-size pores within its struts for enhanced kinetics during oxidation. In this work, the detailed 3D digital representation of the complex dual-...

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Thermochemical CO2 splitting using double perovskite-type Ba2Ca0.66Nb1.34−xFexO6−δ

Department of Chemistry, University of Cal AB, T2N-1N4, Canada. E-mail: vthangad@u Department of Materials Science and Engin Singapore Department of Chemical and Petroleum E University Drive NW, Calgary, AB, T2N-1N4 Instituto de Qúımica F́ısica “Rocasolano Cienticas, Serrano 119, 28006 Madrid, Sp School of Chemistry, The University of Birm † Electronic supplementary informa 10.1039/c6ta10285a C...

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ژورنال

عنوان ژورنال: Phys. Chem. Chem. Phys.

سال: 2014

ISSN: 1463-9076,1463-9084

DOI: 10.1039/c4cp01172d