@article{2be46ac32b57422196c2672ef9d49acc,
title = "Influence of temperature on gas transport properties of tetraaminodiphenylsulfone (TADPS) based polybenzimidazoles",
abstract = "Polybenzimidazoles have been the focus of increasing study due to their good H2/CO2 separation properties and high thermal stability. Gas transport properties of a series of polybenzimidazoles based on a tetraaminodiphenylsulfone (TADPS) monomer have been characterized at temperatures from 35 to 190 °C. Permeability increases with increasing temperature for all gases, and activation energies of permeation increase with increasing gas size with the exception of CO2. CO2 exhibits a lower activation energy of permeation than H2 or He, presumably due to strong sorption effects. Gas separations with TADPS-based PBIs are strongly size selective, with CO2/N2, CO2/CH4, and N2/CH4 selectivities decreasing with increasing temperature. However, H2/CO2 selectivities increase with increasing temperature due to a lower activation energy of permeation for CO2 than for H2. All PBIs tested move toward the upper right on the H2/CO2 upper bound as temperature increases. Estimated diffusivities increase significantly with temperature, indicating high activation energies of diffusion that are consistent with the strongly size-sieving nature of these materials.",
author = "Stevens, {Kevin A.} and Moon, {Joshua D.} and Hailun Borjigin and Ran Liu and Joseph, {Ronald M.} and Riffle, {Judy S.} and Freeman, {Benny D.}",
note = "Funding Information: The authors gratefully acknowledge financial support for the experimental work reported here from the Division of Chemical Sciences, Geociences, and Biosciences, Office of Basic Energy Sciences of the U.S. Department of Energy through Grant DE-FG02-02ER15362 . This material is based upon work supported in part by the National Science Foundation Graduate Research Fellowship Program under Grant DGE-1610403 . Any opinions, findings and conclusions or recommendations expressed in this material are those of the authors and do not necessarily reflect the views of the National Science Foundation. Funding Information: The authors gratefully acknowledge financial support for the experimental work reported here from the Division of Chemical Sciences, Geociences, and Biosciences, Office of Basic Energy Sciences of the U.S. Department of Energy through Grant DE-FG02-02ER15362. This material is based upon work supported in part by the National Science Foundation Graduate Research Fellowship Program under Grant DGE-1610403. Any opinions, findings and conclusions or recommendations expressed in this material are those of the authors and do not necessarily reflect the views of the National Science Foundation. Publisher Copyright: {\textcopyright} 2019 Elsevier B.V. Copyright: Copyright 2019 Elsevier B.V., All rights reserved.",
year = "2020",
month = jan,
day = "1",
doi = "10.1016/j.memsci.2019.117427",
language = "English",
volume = "593",
journal = "Journal of Membrane Science",
issn = "0376-7388",
publisher = "Elsevier BV",
}