448995 Colloidal ZIF-8 PBI/6FDA-DAM Immiscible Polymer Blend Membranes for H2/CO2 Separation

Monday, May 23, 2016
Evergreen Ballroom (Hyatt Regency Bellevue)
Yu Huang1, Nimanka Panapitiya2, Edson Vladimir Perez Jimenez1, John P. Ferraris2, Kenneth J. Balkus Jr.2 and Inga H. Musselman2, (1)Department of Chemistry, The University of Texas at Dallas, Richardson, TX, (2)Department of Chemistry and Biochemistry, The University of Texas at Dallas, Richardson, TX

Colloidal ZIF-8 PBI/6FDA-DAM Immiscible Polymer Blend Membranes for H2/CO2 Separation

Yu Huang, Nimanka P. Panapitiya, Edson V. Perez, John P. Ferraris, Kenneth J. Balkus, Jr., Inga H. Musselman

ABSTRACT

High pressure and high temperature separation of H2/CO2 is of great interest for clean energy generation in processes such as coal gasification.  Flat and tubular membranes of the polybenzimidazole (PBI)/6FDA-DAM immiscible blend containing colloidal ZIF-8 were prepared to test the gas separation performance of single gases and the H2/CO2 gas mixture at various pressures and temperatures.  It was found that the amount of colloidal ZIF-8 in the blend has a remarkable effect on membrane morphology and gas separation.  An increase of the loading for the colloidal ZIF-8 in the blend leads to a decrease in the size for the dispersed 6FDA-DAM domains.  A higher experimental temperature resulted in higher gas permeance through the membrane, while the gas selectivity remained constant.  At 30 atm and 300 °C, a 5% colloidal ZIF-8 PBI/6FDA-DAM membrane exhibited a H2 permeance of 29.74 GPU (approximately 476 Barrer), an ideal H2/CO2 selectivity of 16.1, and a H2/CO2 gas mixture selectivity of 11.4.  In comparison to other membranes, this polymer blend membrane shows high gas permeance and high gas selectivity, and it surpasses the upper bound of the 2008 Robeson plot for H2/CO2.


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