3 years ago

Effect of chemically modified clinoptilolite on the thermal, morphological, and gas separation properties of mixed matrix membranes

Effect of chemically modified clinoptilolite on the thermal, morphological, and gas separation properties of mixed matrix membranes
Luis Alfonso García-Cerda, Sandra P. García-Rodríguez, H. Iván Meléndez-Ortiz, Gema C. Hernández-Silva, Angel de J. Montes-Luna, Griselda Castruita-de León
Mixed matrix membranes (MMM) based on polysulfone and chemically modified clinoptilolite were prepared. Clinoptilolite enriched with Ca2+, K+, and Na+ by ion exchange at two test temperatures was prepared. Chemical composition was monitored by energy dispersive X-ray spectroscopy. X-ray diffraction, thermogravimetric analysis, and N2 adsorption–desorption isotherms were also performed. Thermal and morphological properties of MMM were evaluated. CH4/CO2 gas mixture permeability tests at different upstream pressure were carried out. Type of exchanged cation in modified clinoptilolite affected the CO2 permeability. An improvement on the CO2/CH4 selectivity values in the MMM compared to the polymeric membrane was appreciated. © 2017 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2017, 134, 45659.

Publisher URL: http://onlinelibrary.wiley.com/resolve/doi

DOI: 10.1002/app.45659

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