Gas transport properties of poly(ether-b-amide) segmented block copolymers

Mixed-gas CO2/CH4 and CO2/N2 separation with sulfonated PEEK membranes

“…Upper bound plots for CO 2 obtained in this work are generally below those available in literature. The gas transport results of the polymer in Al-form are closest to the upper bound trade off curve.…”

“…The removal of CO 2 from mixtures with CH 4 , N 2 and H 2 is of interest for a wide variety of applications such as natural gas separations, flue gas cleaning, and syngas processing [1][2][3]. Polymeric membranes have received tremendous attention due to several advantages, such as low cost, high energy efficiency and low ecological footprint [4,5].…”

Membrane technologies for CO2 capture

“…The solubility is a thermodynamic factor, which reflects the number of molecules dissolved in the membrane material [38] and is determined by polymer-penetrant interactions, the inherent condensability of the gas, and the free volume in the polymer [39]. More specifically for the separation of CO 2 from CH 4 , CO 2 is more condensable and more polar than CH 4 and a higher CO 2 solubility in the polymer membrane can be expected.…”

“…Permeation of gases preferentially occurs through the soft polyether blocks whereas the hard polyamide blocks provide the mechanical stability. Poly ether based block copolymers offer an attractive material for high permeance CO 2 separation membranes [39]. The Figure 5 shows the chemical structure of PEBAX®.…”

“…Majchrowicz et al [39] showed the relationship between precipitation behavior, CO 2 partial pressure and salt concentrations. Of the four tested In our previous work [40] we investigated the kinetics of the absorption of CO 2 in sarcosine salt solutions and observed very high reaction rate constants for the reaction between CO 2 and the amine (carbamate formation).…”