The SEC figures in Table show that the process investigated is competitive with state-of-the-art technologies, closely matching the performance of adsorption and absorption processes and fitting within the spectrum of alternative HBCC processes -which make use of promoters -when assuming isothermal compression. Membrane-based separation holds the potential for the lowest SEC among the technologies considered, but achieving values below 1 GJ/t CO2 requires highly selective membranes and flue gases with more than 20 mol% CO 2 . Promising asymmetric membranes exhibiting similarly promising characteristics regarding permeability and selectivity are still in development and face challenges in up-scaling . In general, the wide range of SECs, influenced by variations in flue gas composition and specific process and plant details, complicates direct comparisons. Therefore, the economic feasibility of our process appears promising, but must be carefully evaluated on a case-by-case basis to determine its practicability.