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On kinetic modelling for solar redox thermochemical H2O and CO2 splitting over NiFe2O4 for H2, CO and syngas production

Abstract

This study aims at developing a kinetic model that can adequately describe solar thermochemical water and carbon dioxide splitting with nickel ferrite powder as the active redox material. The kinetic parameters of water splitting of a previous study are revised to include transition times and new kinetic parameters for carbon dioxide splitting are developed. The computational results show a satisfactory agreement with experimental data and continuous multicycle operation under varying operating conditions is simulated. Different test cases are explored in order to improve the product yield. At first a parametric analysis is conducted, investigating the appropriate duration of the oxidation and the thermal reduction step that maximize the hydrogen yield. Subsequently, non-isothermal oxidation step is simulated and proven an interesting option for increasing the hydrogen production. The kinetic model is adapted to simulate production yields in structured solar reactor components i.e. extruded monolithic structures as well.

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Publication details

The article was received on 14 Jun 2017, accepted on 15 Sep 2017 and first published on 15 Sep 2017


Article type: Paper
DOI: 10.1039/C7CP04002D
Citation: Phys. Chem. Chem. Phys., 2017, Accepted Manuscript
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    On kinetic modelling for solar redox thermochemical H2O and CO2 splitting over NiFe2O4 for H2, CO and syngas production

    D. A. Dimitrakis, M. Syrigou, S. Lorentzou, M. Kostoglou and A. G. Konstandopoulos, Phys. Chem. Chem. Phys., 2017, Accepted Manuscript , DOI: 10.1039/C7CP04002D

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