چكيده به لاتين
Nowadays, one of the options to reduce gas streams emission, using of alkanolamines that it has considered as a most important technology for removing carbon dioxide. One of the key parameters is using of effective solvent in this technology. Blended amines were suggested for combine advantages and eliminate disadvantages of amines. The aim of this study is to develop a model for mass transfer flux in the reactive absorption process. Mass flux parameters were studied using pi-Buckingham theorem and variables as dimensional parameters were extracted. Absorption process with aqueous amine solvent modeled according to the four laws of chemical equilibrium, phase equilibrium, mass balance, and charge balance (with thermodynamic model suitable for any solvent) then absorption process was simulated using MATLAB software. Dimensionless parameters were calculated using experimental data sources listed. In presented correlations, the effect of the operating parameters was investigated such as partial pressure of CO2, Temperature, the amount of free amine in solution as well as the parameters of dimensionless, film parameter, enhancement factor, the loading, the film thickness. For vapor phase was used the virial equation of state and for the liquid phase that is an electrolyte solution, the thermodynamic equations Pitzer, UNIQUAC, E-NRTL was used. The results showed that the average relative error of the predicted mass flux relationships for all three solutions, MDEA-PZ, MEA-PZ, MDEA-PZ respectively, 3.6, 4.5, 4.8, which shows a high accuracy the predicted correlations. It was also observed that the mass flux increases by reducing the loading and film parameter. Film parameter of three solutions was compared that solution MEA-PZ was highest that indicates the mechanisms and kinetics of the reaction of piperazine is instantaneous.
