Fabrication of Pebax/<scp>SAPO</scp> mixed matrix membranes for <scp>CO<sub>2</sub></scp>/<scp>N<sub>2</sub></scp> separation
Suixin Zhang, Yingfei Zheng, Yonghong Wu, Bing Zhang
Abstract
Abstract Mixed matrix membranes (MMMs) were prepared by solvent evaporation method using Pebax‐1074 polymer as matrix and inorganic zeolite SAPO‐23 as dopant. The morphology, surface functional groups, microstructure, thermal stability, and separation performance of MMMs were analyzed by scanning electron microscopy, Fourier transform infrared spectroscopy, X‐ray diffraction, thermogravimetric analysis, and gas permeation, respectively. The effects of dopant loading amount, permeation temperature, and permeation pressure on the structure and properties of MMMs were investigated. The results showed that the introduction of SAPO zeolite reduced the crystallinity of the MMMs and improved the CO 2 /N 2 selectivity. Under the conditions of 30°C and 0.15 MPa, the MMMs prepared by incorporating with 5% SAPO zeolite in content exhibited the highest CO 2 /N 2 selectivity of 72.0 together with the CO 2 permeability of 98.2 Barrer.