optimizing co2/ch4 separation performance of modified pebax mh 1657 membrane using a statistical experimental design technique

Statistically based experimental design (central composite design, ccd) was applied to analyze and optimize the effect of peg-ran-ppg (10–50 wt%) and cubtc (0–20 wt%) mass contents on the co2 permeance and co2/ch4 ideal selectivity of pebax mh 1657/polysulfone composite membrane. based on the regression coefficients of the obtained models, the co2 permeance was notably influenced by peg-ran- ppg, while cubtc has the most significant effect on the co2/ch4 ideal selectivity. under the optimum conditions (peg-ran-ppg: 32.76 wt% and cubtc: 20 wt%), nearly 620% increase in the co2 permeance and 43% enhancement in the co2/ch4 ideal selectivity was observed compared to the neat pebax.