Abstract—Abstract—In real structures of mixed matrix membranes (MMMs), voids may be formed around the filler particles due to detachment of polymer chain’s from the filler particles’ surface. Some general predictive models such as Maxwell, Bruggeman, and Pal, have been employed to predict the permeabilities of this type of MMMs with incorporated nonporous particles. Calculated AAREs were high as 11.1, 54.8, 25.4 %. In this article, predictive permeation models were modified to improve prediction accuracy of these models by introduction of beta parameter, ß. This parameter is introduced due to overestimation of employed Knudsen mechanism for prediction of the formed voids around the filler particles’ permeability. After this introduction, AAREs of the modified Maxwell, Bruggeman, and Pal models were reduced to 8.4, 46.6, and 21.9 %, respectively. On the other hand, selectivities’ AAREs were also considerably reduced after introduction of the ß parameter: from 54.9, 303.6, 67.7 to 5.1, 35, 34.5 for the modified Maxwell, Bruggeman, and Pal models, respectively.
Index Terms—Mixed matrix membrane, permeation prediction, predictive models, void formation.
The authors are with the Chemical Engineering Department, Faculty of Engineering, Razi University, Kermanshah, Iran (e-mail: omidbakhtiari@iust.ac.ir, n_sadeghi_67@yahoo.com).
[PDF]
Cite:O. Bakhtiari and N. Sadeghi, "The Formed Voids around the Filler Particles Impact on the Mixed Matrix Membranes’ Gas Permeabilities," International Journal of Chemical Engineering and Applications vol. 5, no. 2 pp. 198-203, 2014.
