Abstract (eng)
In our solar system, the planet Venus is the most similar to Earth in both size and mass. Nevertheless, Venus has very hostile conditions, with an atmosphere dominated by carbon dioxide (CO2), as well as surface temperatures of about 460°C and a pressure of 92 bar. In this study, Venus-like planets with atmospheres in chemical equilibrium are simulated with the codes FastChem and GGchem. For this purpose, different parameters, such as the ratio of carbon to oxygen (C/O) or to nitrogen (C/N), are varied in the simulated atmosphere of the planets and changes in the chemical composition are recorded. Furthermore, the influences of different minerals on the surface are examined with the help of mineral redox buffers.