Publications in Scientific Journals:
A.H. Bork, E. Povoden-Karadeniz, J.L.M. Rupp:
"Modeling thermochenmical solar-to-fuel conversion: CALPHAD for thermdynamic assessment studies of perovskite, exemplified for (La,Sr)MnO3";
Advanced Energy Materials,
Two-step solar thermochemical fuel production has the potential to reduce global greenhouse gas emissions and replace fossil fuels. The success of the technology relies on the development of materials with a high thermochemical efficiency. Perovskites with the general structure ABO3 have received much attention recently due to impressive fuel productivity and their amenability of substituting and doping both A- and B-site. Despite the potential of perovskites for solar-to-fuel conversion, literature on their solar thermochemical efficiency is scarce and finding the best chemical composition and optimum operation conditions is unknown. For this purpose, we suggest to use CALPHAD data libraries to access the relevant thermodynamic properties of perovskites. We demonstrate the usefulness of employing CALPHAD data by a full thermodynamic study of the model case compositions of La1-xSrxMnO3-δ. We use data on oxygen-nonstoichiometry and heat capacity in the temperature range of 1073-1873K relevant
for solar-to-fuel. Unlike earlier thermodynamic assessments of perovskites that rely on a single literature source and a limited temperature range, the CALPHAD approach takes all available
data in literature into consideration. Thermochemical equilibrium models of fuel yields are accompanied by validations towards experimental results in literature, and we highlight the
effects of strontium doping level on the efficiency.
"Official" electronic version of the publication (accessed through its Digital Object Identifier - DOI)
Created from the Publication Database of the Vienna University of Technology.