carbon dioxide absorption from flue gases using sodium hydroxide as liquid solvent
Advancing the chemical engineering fundamentals
Distillation, Absorption & Extraction (T2-10P)
Keywords: Carbon dioxide , CO2 , packed bed , simulation , greenhouse gases
In recent years, the removal of CO2 from industrial gas streams has become important. This has resulted from the environmental concern for reduction of greenhouse gas emissions from industrial sources. Here, CO2 is considered to be the largest contributor to the global warming problem, and is thus the major target for reduction. In this study simulation of carbon dioxide absorption by Sodium Hydroxide solution in a packed bed has been investigated. First, mass and energy balances were applied around a differential height of the bed. So, the governing equations were obtained. Surface renewal theory by Danckwerts was used to represent the mass transfer operation. The differential equations we obtained should be solved to represent the exit concentration of carbon dioxide in gas phase. Since half of the boundary conditions were not known we used shooting method to estimate these boundary conditions and fourth order Runge-kutta method was used to solve the differential equations by MATLAB software. A verification of model was carried out by comparison with the experimental data taken from the packed bed. Gas samples were analyzed by gas chromatography. The predicted results and actual data represent an appreciable agreement.
Presented Tuesday 18, 13:30 to 15:00, in session Distillation, Absorption & Extraction (T2-10P).
