Equilibrium Stage Mathematical Model of the Chemical Absorption of CO2 into Monoethanolamine (MEA) Aqueous Solution

PATRICIA L. MORES; NICOLÁS J. SCENNA; MUSSATI SERGIO

Lisboa

Conferencia; 2nd International Conference on Engineering Optimization; 2010

This paper presents an equilibrium stage mathematical model to optimize the operating conditions to remove CO2 from flue-gases using MonoEthanolAmine (MEA) aqueous solution in a stage column. For the modeling, the absorption column is divided into a number of segments assuming that liquid and gas phases are well mixed. The number of stages of the column is assumed as a model parameter while temperature and composition profiles and flow-rates of the aqueous solution and gas streams along the column are considered as optimization variables. The proposed model is implemented in GAMS (General Algebraic Modeling System) and CONOPT is used as NLP solver. The influence of main process operating conditions the inlet gas and aqueous amine solution conditions (composition, temperature and flow-rates) and number of trays or height equivalent to a theoretical plate (HETP) on the absorption performance is investigated. Detailed discussion of the optimization results are presented through different case studies The proposed model is implemented in GAMS (General Algebraic Modeling System) and CONOPT is used as NLP solver. The influence of main process operating conditions the inlet gas and aqueous amine solution conditions (composition, temperature and flow-rates) and number of trays or height equivalent to a theoretical plate (HETP) on the absorption performance is investigated. Detailed discussion of the optimization results are presented through different case studies The proposed model is implemented in GAMS (General Algebraic Modeling System) and CONOPT is used as NLP solver. The influence of main process operating conditions the inlet gas and aqueous amine solution conditions (composition, temperature and flow-rates) and number of trays or height equivalent to a theoretical plate (HETP) on the absorption performance is investigated. Detailed discussion of the optimization results are presented through different case studies