Investigating influences of geometric factors on a solar thermochemical reactor for two-step carbon dioxide splitting via CFD models

Solar Energy ◽  
2019 ◽  
Vol 188 ◽  
pp. 935-950 ◽  
Author(s):  
Han Zhang ◽  
Joseph D. Smith
Keyword(s):  
Carbon Dioxide ◽  
Cfd Models ◽  
Geometric Factors ◽  
Carbon Dioxide Splitting ◽  
Solar Thermochemical

Ce K edge XAS of ceria-based redox materials under realistic conditions for the two-step solar thermochemical dissociation of water and/or CO2

2015 ◽  
Vol 17 (40) ◽  
pp. 26988-26996 ◽  
Author(s):  
Matthäus Rothensteiner ◽  
Simone Sala ◽  
Alexander Bonk ◽  
Ulrich Vogt ◽  
Hermann Emerich ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Absorption Spectroscopy ◽  
X Ray ◽  
Carbon Dioxide Splitting ◽  
Solar Thermochemical ◽  
X Ray Absorption

X-ray absorption spectroscopy was used to characterise ceria-based materials under realistic conditions present in a reactor for solar thermochemical two-step water and carbon dioxide splitting.

Cobalt Ferrite in YSZ for Use as Reactive Material in Solar Thermochemical Water and Carbon Dioxide Splitting, Part II: Kinetic Modeling

JOM ◽  
2013 ◽  
Vol 65 (12) ◽  
pp. 1682-1693 ◽  
Author(s):  
Kyle M. Allen ◽  
Nick Auyeung ◽  
Nima Rahmatian ◽  
James F. Klausner ◽  
Eric N. Coker
Keyword(s):  
Carbon Dioxide ◽  
Kinetic Modeling ◽  
Cobalt Ferrite ◽  
Reactive Material ◽  
Carbon Dioxide Splitting ◽  
Solar Thermochemical

Demonstration of a Solar Reactor for Carbon Dioxide Splitting via the Isothermal Ceria Redox Cycle and Practical Implications

2016 ◽  
Vol 30 (8) ◽  
pp. 6654-6661 ◽  
Author(s):  
Brandon J. Hathaway ◽  
Rohini Bala Chandran ◽  
Adam C. Gladen ◽  
Thomas R. Chase ◽  
Jane H. Davidson
Keyword(s):  
Carbon Dioxide ◽  
Redox Cycle ◽  
Solar Reactor ◽  
Carbon Dioxide Splitting ◽  
Practical Implications

Reduction enthalpy and charge distribution of substituted ferrites and doped ceria for thermochemical water and carbon dioxide splitting with DFT+U

2016 ◽  
Vol 18 (34) ◽  
pp. 23587-23595 ◽  
Author(s):  
D. A. Dimitrakis ◽  
N. I. Tsongidis ◽  
A. G. Konstandopoulos
Keyword(s):  
Carbon Dioxide ◽  
Charge Distribution ◽  
Solar Fuels ◽  
Doped Ceria ◽  
Nickel Ions ◽  
Carbon Dioxide Splitting

Effect of Nickel ions on reduction energy and charge distribution of oxygen – neighbouring ions in NiFe2O4 for solar fuels.

scholarly journals Structural changes in equimolar ceria–hafnia materials under solar thermochemical looping conditions: cation ordering, formation and stability of the pyrochlore structure

RSC Advances ◽  
2017 ◽  
Vol 7 (85) ◽  
pp. 53797-53809 ◽  
Author(s):  
Matthäus Rothensteiner ◽  
Alexander Bonk ◽  
Ulrich F. Vogt ◽  
Hermann Emerich ◽  
Jeroen A. van Bokhoven
Keyword(s):  
Carbon Dioxide ◽  
Structural Changes ◽  
Pyrochlore Structure ◽  
Cation Ordering ◽  
Reducing Conditions ◽  
Step Dissociation ◽  
Solar Thermochemical

Equimolar ceria–hafnia oxides form a pyrochlore Ce2Hf2O7 under the reducing conditions of a solar thermochemical looping reactor for the two-step dissociation of water or carbon dioxide.

Splitting Water and Carbon Dioxide via the Heterogeneous Oxidation of Zinc Vapor: Thermodynamic Considerations

2010 ◽  
Author(s):  
Luke J. Venstrom ◽  
Jane H. Davidson
Keyword(s):  
Carbon Dioxide ◽  
Mass Transfer ◽  
Carbon Monoxide ◽  
Reaction Path ◽  
Zinc Vapor ◽  
Complete Conversion ◽  
Heterogeneous Oxidation ◽  
Carbon Dioxide Splitting ◽  
Heat Recuperation ◽  
Splitting Water

The heterogeneous hydrolysis/oxidation of zinc vapor is proposed as a promising reaction path for the exothermic step in two-step Zn/ZnO solar thermochemical water and carbon dioxide splitting cycles. This approach circumvents mass transfer limitations encountered in the oxidation of solid or liquid zinc, promising rapid hydrogen/carbon monoxide production rates and complete conversion of zinc. In this paper, a parametric thermodynamic analysis is presented to quantify the penalty of generating zinc vapor as well as the benefit of achieving complete conversion of zinc via the heterogeneous oxidation of zinc vapor. The penalty for generating zinc vapor is a reduction in water splitting efficiency from 36% to 27% and a reduction in carbon dioxide splitting efficiency from 39% to 31%. However, with heat recuperation this penalty can be avoided. The benefit of completely converting zinc via the heterogeneous oxidation of zinc vapor is an increase in efficiency from ∼6% to 27% and 31% for water and carbon dioxide splitting, respectively.

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