Design of carbon dioxide dehydration process using derivative-free superstructure optimization

摘要: Abstract A comprehensive optimal design for the CO2 dehydration process created by decomposition-based superstructure optimization is proposed. To reach most economical configuration, model has been developed including binary interaction parameter regression of NRTL-RK thermodynamic model, unit operation modeling, and identification connectivity each operations in superstructure. The imbeds 30,720 possible alternatives options. simplify problem, simulation was explicitly carried out a sequential simulator, constrained problem solved externally using genetic algorithm an Aspen Plus-MATLAB interface. includes five-stage contactor, nine-stage still column (with feed stream entering at seventh stage), lean/rich solvent heat exchanger, cold rich split flow fed to first stage column. total annualized cost optimum 6.70 M$/year, which corresponds specific 1.88 $/t CO2. As part optimization, Monte Carlo performed analyze sensitivity utility volatility; refrigerant steam present influential costs.