Suchergebnisse

[EN] Novel selective polymeric thin-film composite membranes (TFCMs) for applications at elevated temperatures were developed. Thin selective layers of the polyimides Matrimid 5218((R)) and 6FDA-6FpDA were cast on a developed polybenzimidazole (PBI) porous support prepared by a phase inversion process. The TFCM properties were investigated with different gases in a wide temperature range, including temperatures up to 270 degrees C. The membranes showed very high thermal stability and performed well at the elevated temperatures. The development of highly thermally resistant polymeric membranes such as these TFCMs opens opportunities for application in high-temperature integrated processes, such as catalytic membrane reactors for the water-gas shift reaction in order to maximize H-2 yield. ; This work was financially supported by the project "New reactor technologies for chemical and biochemical synthesis processes" ("Neue Reaktortechnologien fur Chemische und Biochemische Syntheseverfahren", FKZ: LFF FV 43), funded by the City of Hamburg (Freie und Hansestadt Hamburg, Behorde furWissenschaft, Forschung und Gleichstellung), Germany, the Spanish Government (SEV-2016-0683, SVP-2014-068356, Project ENE2014-57651-R and IJCI-2016-28330 grants), and Generalitat Valenciana (PROMETEO/2018/006 grant). ; Weigelt, F.; Escorihuela-Roca, S.; Descalzo, A.; Tena, A.; Escolástico Rozalén, S.; Shishatskiy, S.; Serra Alfaro, JM. (2019). Novel Polymeric Thin-Film Composite Membranes for High-Temperature Gas Separations. Membranes. 9(4):1-12. https://doi.org/10.3390/membranes9040051 ; S ; 1 ; 12 ; 9 ; 4 ; Schuldt, K., Pohlmann, J., Shishatskiy, S., & Brinkmann, T. (2018). Applicability of PolyActive™ Thin Film Composite Membranes for CO2 Separation from C2H4 Containing Multi-Component Gas Mixtures at Pressures up to 30 Bar. Membranes, 8(2), 27. doi:10.3390/membranes8020027 ; Brinkmann, T., Lillepärg, J., Notzke, H., Pohlmann, J., Shishatskiy, S., Wind, J., & Wolff, T. (2017). Development of CO 2 Selective Poly(Ethylene ...

1 12 9 4 ; S Herdegen, V., Werner, A., Milew, K., Haseneder, R., & Aubel, T. (2018). ACHEMA 2018: Membranen und Membranverfahren. Chemie Ingenieur Technik, 90(12), 1964-1971. doi:10.1002/cite.201800157 ; [EN] Novel selective polymeric thin-film composite membranes (TFCMs) for applications at elevated temperatures were developed. Thin selective layers of the polyimides Matrimid 5218((R)) and 6FDA-6FpDA were cast on a developed polybenzimidazole (PBI) porous support prepared by a phase inversion process. The TFCM properties were investigated with different gases in a wide temperature range, including temperatures up to 270 degrees C. The membranes showed very high thermal stability and performed well at the elevated temperatures. The development of highly thermally resistant polymeric membranes such as these TFCMs opens opportunities for application in high-temperature integrated processes, such as catalytic membrane reactors for the water-gas shift reaction in order to maximize H-2 yield. This work was financially supported by the project "New reactor technologies for chemical and biochemical synthesis processes" ("Neue Reaktortechnologien fur Chemische und Biochemische Syntheseverfahren", FKZ: LFF FV 43), funded by the City of Hamburg (Freie und Hansestadt Hamburg, Behorde furWissenschaft, Forschung und Gleichstellung), Germany, the Spanish Government (SEV-2016-0683, SVP-2014-068356, Project ENE2014-57651-R and IJCI-2016-28330 grants), and Generalitat Valenciana (PROMETEO/2018/006 grant). Weigelt, F.; Escorihuela-Roca, S.; Descalzo, A.; Tena, A.; Escolástico Rozalén, S.; Shishatskiy, S.; Serra Alfaro, JM. (2019). Novel Polymeric Thin-Film Composite Membranes for High-Temperature Gas Separations. Membranes. 9(4):1-12. https://doi.org/10.3390/membranes9040051 Schuldt, K., Pohlmann, J., Shishatskiy, S., & Brinkmann, T. (2018). Applicability of PolyActive™ Thin Film Composite Membranes for CO2 Separation from C2H4 Containing Multi-Component Gas Mixtures at Pressures up to 30 Bar. Membranes, 8(2), 27. ...

Thin film composite membranes of poly(ether-block-amide) copolymer Pebax® 3533 were prepared for the first time on asymmetric polysulfone supports by a phase inversion method. The casting solution concentration and the number of layers were varied to study their influence on the selective layer thickness and the gas separation performance. The casting solution concentrations of polymer dissolved in the 1-propanol/1-butanol mixture were 0.25, 0.5, 1.0 and 1.5 wt%. These conditions produced membranes with selective skin layers with thicknesses from 0.2 to 1.8 µm. All the membranes were characterized by scanning electron microscopy, thermogravimetric analysis and infrared spectroscopy. Furthermore, the intrinsic viscosity of all the casting solutions was studied to understand the effect of the polymer concentration on the homogeneity and the gas separation properties of the obtained membranes. In general, lower viscosity of casting solutions rendered to more defective skin layers, resulting in a higher number of layers required to obtain selective membranes. The gas separation performance was tested for the post-combustion 15/85 CO2/N2 mixture at 25–50 °C and under a feed pressure of 3 bar. The best separation performance was achieved with the 0.5 wt% casting solution membranes after the deposition of four polymer layers, obtaining a CO2 permeance of 127 GPU and a CO2/N2 selectivity of 21.4 at 35 °C, the same selectivity of the corresponding dense membrane but with much higher permeance. ; Financial support from the Spanish Research Projects MAT2016-77290-R (MINECO/AEI, FEDER/UE), PID2019‐104009RB−I00/AEI/10.13039/501100011033 (Agencia Estatal de Investigación, Spain) and T43-20R (the Aragón Government and ESF) is gratefully acknowledged. L. Martínez-Izquierdo also thanks the Aragón Government (DGA) for her PhD grant. All microscopy work was done in the Laboratorio de Microscopías Avanzadas at the Instituto de Nanociencia de Aragón (LMA-INA). ; Peer reviewed