109025 20230519145353.0 doi 10.1002/cssc.202002700 sideral 121608 ART-2021-121608 eng Sanchez-Lainez, J. (orcid)0000-0001-6627-0079 Green Preparation of Thin Films of Polybenzimidazole on Flat and Hollow Fiber Supports: Application to Hydrogen Separation 2021 Access copy available to the general public Unrestricted This work shows the preparation of thin films, with thickness from 70 nm to 1 mu m, of meta-polybenzimidazole (m-PBI) on polyimide P84 supports. Ethanolic solutions of m-PBI were used to coat flat and hollow fiber supports of asymmetric P84 with m-PBI in a process where the coating and drying was performed at room temperature. A solution of NaOH in EtOH allowed the dissolution of the m-PBI powder, providing the perfect coating solution to build thin films of m-PBI without damaging the polymeric support. It also meant a green alternative, avoiding the use of toxic solvents, such as dimethylacetamide. The resulting membranes have been tested for the separation of H-2 mixtures at high temperature at different setups to allow checking their reproducibility. With 100 nm thickness the membranes showed their best gas separation performance. For flat membranes at 180 degrees C and 3 bar feed pressure a H-2 permeance of 48.5 GPU was obtained, with respective H-2/CO2 and H-2/N-2 selectivities of 33.3 and 55.8. Besides, the hollow fibers under a feed pressure of 6 bar and tested at the same temperature showed near 90 GPU of H-2 with a H-2/CO2 selectivity of 13.5 in the one-fiber module and over 39 GPU of H-2 with a H-2/CO2 selectivity of 20.2 in the five-fiber module. Finally, the stability of the membranes was proved for 22 days at 180 degrees C. info:eu-repo/grantAgreement/ES/DGA-FSE/T43-17R info:eu-repo/grantAgreement/ES/MINECO-AEI-FEDER/MAT2016-77290-R info:eu-repo/grantAgreement/ES/MINECO-AEI/PID2019-104009RB-I00-AEI-10.13039-501100011033 info:eu-repo/semantics/openAccess All rights reserved http://www.europeana.eu/rights/rr-f/ 9.14 2021 GREEN & SUSTAINABLE SCIENCE & TECHNOLOGY 11 / 47 = 0.234 2021 Q1 T1 CHEMISTRY, MULTIDISCIPLINARY 30 / 180 = 0.167 2021 Q1 T1 2.096 2021 Energy (miscellaneous) 2021 Q1 Materials Science (miscellaneous) 2021 Q1 Chemical Engineering (miscellaneous) 2021 Q1 14.1 2021 info:eu-repo/semantics/article info:eu-repo/semantics/acceptedVersion Etxeberria-Benavides, M. David, O. Tellez, C. Universidad de Zaragoza (orcid)0000-0002-4954-1188 Coronas, J. Universidad de Zaragoza (orcid)0000-0003-1512-4500 5005 555 Universidad de Zaragoza Dpto. Ing.Quím.Tecnol.Med.Amb. Área Ingeniería Química 14, 3 (2021), 952-960 ChemSusChem ChemSusChem 1864-5631 983042 http://zaguan.unizar.es/record/109025/files/texto_completo.pdf Postprint 1189763 http://zaguan.unizar.es/record/109025/files/texto_completo.jpg?subformat=icon icon Postprint oai:zaguan.unizar.es:109025 articulos driver 2023-05-18-13:29:09 ARTICLE