Nashrieh Shimi va Mohandesi Shimi Iran

Nashrieh Shimi va Mohandesi Shimi Iran

Modeling of Mass Transfer in Reactive Absorption Process and Investigation of Different Parameters Effect on Mass Transfer Flux

Document Type : Research Article

Authors
Ali Reza Hemmati
Ahad Ghaemi
Department of Chemical Engineering, School of Chemical, Petroleum and Gas Engineering, University of Science and Technology, Tehran, I.R. IRAN
Abstract
In the present study, carbon dioxide mass transfer flux in the reactive absorption process was modeled by three solutions of methyldiethanolamine (MDEA), monoethanolamine (MEA), and piperazine (PZ) using the film theory model and all governing equations solved simultaneously. The effects of all components' concentration during film and mass transfer flux with and without film displacement were investigated and predicted values were compared with experimental data of the carbon dioxide absorption process in the desired solutions. The influence of various dimensionless parameters including film and loading parameters as well as the effects of reaction, diffusion, film velocity, and eddy on mass transfer in the proposed model has been studied. The deviations were calculated from the experimental data for the mass transfer flux by calculating the average relative deviation (ARD). The values of ARD were obtained at about 5.30%, 8.24%, and 6.56% for PZ, MEA, and MDEA solutions respectively. Moreover, based on the film displacement, the mass transfer flux was affected and the average relative deviations decreased. For PZ solution, 0.1% and for MEA and MDEA solutions, 0.6% and 1.1% error reductions were observed, respectively. Furthermore, the results show that the effects of reaction and diffusion on the mass transfer flux are on average more than 35% than the effects of film velocity and eddy influence.
Keywords
CO2 reactive-absorption
Mass transfer flux
Film modeling
Amine solution
Film velocity

Subjects

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