Due to the change in climate, carbon dioxide got into the focus of research for reduction of greenhouse gas emissions. Post-combustion technologies are interesting, because of the retrofit possibility of existing power plants. Therefore two of the most developed post-combustion processes were compared to each other. Objective of this work was the process comparison of the two post-combustion capture processes based on an aqueous monoethanolamine solution or an aqueous ammonia solution at chilled conditions. The process comparison was based on simulation results. For each process the main operation data (specific reboiler duty, specific cooling duty, specific power duty, specific solvent flow, specific water and solvent consumption) were calculated and considered in the evaluation. Further, an approximate evaluation of the investment costs for both processes was done. This work should be useful to students and professionals in engineering fields dealing with post-combustion processes and modeling of these systems.