Techno-economic evaluation of membrane and enzymatic-absorption processes for CO2 capture from flue-gas

•Optimization and comparison of membrane and enzymatic-absorption processes used in a 600 MWe power plant.•Technical issues and economic aspects of the membrane process for different CO2 recoveries highlighted.•Effects of desorption pressure and temperature on CO2 absorber/desorber performance was discussed.•Techno-economic analysis showed effects of operating parameters on energy loss in the power plant.•Compared removal efficiency of PC solvent catalyzed with CA enzyme and traditional solvents absorption processes.