Simulation of Carbon Dioxide Removal by Three Amine Mixture of Diethanolamine, Methyldiethanolamine, and 2-Amino- 2-Methyl-1-Propanol in a Hollow Fiber Membrane Contactor Using Computational Fluid Dynamics

  • Pedram Bahrami Moghim
  • Toraj Mohammadi

Abstract

The present paper investigates the simulation of carbon dioxide removal from natural gas stream by a mixture of three amines of diethanolamine (DEA), methyldiethanolamine (MDEA), and 2-amino- 2-methyl-1-propanol (AMP) in a hollow fiber membrane contactor made from polypropylene using finite volume method (FVM). The effect of structural parameters of length and thickness of membrane and diameter of shell on the removal efficiency was studied and the optimized values were calculated. The calculations were made with the assumption of two-dimensional symmetric geometry and compared with those of three-dimensional one. The effect of number and size of the meshes on the simulation results was also studied. The simulation results were validated against the experimental values from the literature. The results imply that the increase in the length and decrease in the thickness of membrane enhances the removal efficiency. As a result, higher quantities of carbon dioxide are transferred from the shell to the membrane and amine solution inside the tube which decreases the effluent CO2 of shell and increases the average concentration of CO2 in the membrane and tube sides. The changes in effluent CO2 of shell with respect to amine solution concentration and influent CO2 indicate the insignificant influence of influent CO2 concentration on the removal efficiency.

Keywords

finite volume method, computational fluid dynamics, carbon dioxide removal, amine solution, hollow fiber membrane contactor
Published in Onlinefirst
24-04-2017
How to Cite
BAHRAMI MOGHIM, Pedram; MOHAMMADI, Toraj. Simulation of Carbon Dioxide Removal by Three Amine Mixture of Diethanolamine, Methyldiethanolamine, and 2-Amino- 2-Methyl-1-Propanol in a Hollow Fiber Membrane Contactor Using Computational Fluid Dynamics. Periodica Polytechnica Chemical Engineering, [S.l.], v. 61, n. 3, p. 227-235, 2017. ISSN 1587-3765. Available at: <https://pp.bme.hu/ch/article/view/9789>. Date accessed: 21 nov. 2017. doi: https://doi.org/10.3311/PPch.9789.
Section
Articles