scholarly journals Characteristics of Gas Permeation Behaviour in Multilayer Thin Film Composite Membranes for CO2 Separation

Membranes ◽  
2019 ◽  
Vol 9 (2) ◽  
pp. 22 ◽  
Author(s):  
Jelena Lillepärg ◽  
Sabrina Breitenkamp ◽  
Sergey Shishatskiy ◽  
Jan Pohlmann ◽  
Jan Wind ◽  
...  

Porous, porous/gutter layer and porous/gutter layer/selective layer types of membranes were investigated for their gas transport properties in order to derive an improved description of the transport performance of thin film composite membranes (TFCM). A model describing the individual contributions of the different layers’ mass transfer resistances was developed. The proposed method allows for the prediction of permeation behaviour with standard deviations (SD) up to 10%. The porous support structures were described using the Dusty Gas Model (based on the Maxwell–Stefan multicomponent mass transfer approach) whilst the permeation in the dense gutter and separation layers was described by applicable models such as the Free-Volume model, using parameters derived from single gas time lag measurements. The model also accounts for the thermal expansion of the dense layers at pressure differences below 100 kPa. Using the model, the thickness of a silicone-based gutter layer was calculated from permeation measurements. The resulting value differed by a maximum of 30 nm to the thickness determined by scanning electron microscopy.

Membranes ◽  
2019 ◽  
Vol 9 (4) ◽  
pp. 51 ◽  
Author(s):  
Weigelt ◽  
Escorihuela ◽  
Descalzo ◽  
Tena ◽  
Escolástico ◽  
...  

Novel selective polymeric thin-film composite membranes (TFCMs) for applications at elevated temperatures were developed. Thin selective layers of the polyimides Matrimid 5218® 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 °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 H2 yield.


2014 ◽  
Vol 53 (3) ◽  
pp. 213-217 ◽  
Author(s):  
Toenjes Koschine ◽  
Klaus Rätzke ◽  
Franz Faupel ◽  
Muntazim Munir Khan ◽  
Thomas Emmler ◽  
...  

2021 ◽  
Vol 623 ◽  
pp. 119077
Author(s):  
Rumwald Leo G. Lecaros ◽  
Reincess E. Valbuena ◽  
Lemmuel L. Tayo ◽  
Wei-Song Hung ◽  
Chien-Chieh Hu ◽  
...  

Sign in / Sign up

Export Citation Format

Share Document