Carbon Dioxide Capture Using a CO₂-Selective Facilitated Transport Membrane

Abstract

A novel CO 2 -selective membrane with the facilitated transport mechanism has been synthesized to capture CO 2 from the industrial gas mixtures, including flue gas. Both mobile and fixed amine carriers were incorporated into the cross-linked poly(vinyl alcohol) (PVA) during the membrane synthesis. The membrane showed desirable CO 2 permeability (with a suitable effective thickness) and CO 2 /N 2 selectivity up to 170 °C. In the CO 2 capture experiments from a gas mixture with N 2 and H 2 , a permeate CO 2 dry concentration of >98% was obtained, using steam as the sweep gas. The effects of the feed flow rate and the sweep:feed molar ratio on the membrane separation performance were investigated. A one-dimensional isothermal model was established to examine the performance of a hollow-fiber membrane module composed of the described CO 2selective membrane. The modeling results show that a CO 2 recovery of >95% and a permeate CO 2 dry concentration of >98% are achievable from a 1000 standard cubic feet per minute (SCFM) (or 21.06 mol/s) flue gas stream with a 2 ft (0.61 m) hollow-fiber module that contained 980 000 fibers.

CO 2 capture from natural gas combined cycles by CO 2 selective membranes

“…• Conduction across the membrane wall is evaluated assuming a thermal conductivity of the material of 0.35 W/m-K and a thickness of 5 µm (Huang et al, 2008).…”

Membrane Separation Processes for Post-Combustion Carbon Dioxide Capture: State of the Art and Critical Overview

“…The two membrane categories have shown attracting performances for CO 2 /N 2 mixture. Recently, a permeability above 6 000 Barrer and a selectivity of about 500 has been reported for a membrane based on poly (allylamine) as a fixed carrier and 2-aminoisobutyric acid-potassium salt as a mobile carrier in a crosslinked PVA matrix (Huang et al, 2008). One peculiarity of FSCM and LM is to require water for the selective reaction towards CO 2 to take place; this constraint does not hold for the other membrane materials.…”

Selective Permeation of CO2 through Amine Bearing Facilitated Transport Membranes

“…Works on gas separation applications using membranes composite with PAMAM dendrimer are limited. However, PAMAM dendrimer immobilized liquid membranes are reported by distinguished researchers [8,9]. In this research paper, we have been emphasized on gas separation behaviour of PAMAM dendrimer (G-0,G-1,G-2,G-3,G-4) composite solid membranes due to its stability and regeneration.The dendrimer composite membranes selectively permeated CO 2 because of the reaction between -NH 2 and CO 2 producing a carbamate ion and a protonated base [8].…”

“…However, PAMAM dendrimer immobilized liquid membranes are reported by distinguished researchers [8,9]. In this research paper, we have been emphasized on gas separation behaviour of PAMAM dendrimer (G-0,G-1,G-2,G-3,G-4) composite solid membranes due to its stability and regeneration.The dendrimer composite membranes selectively permeated CO 2 because of the reaction between -NH 2 and CO 2 producing a carbamate ion and a protonated base [8]. Sarma et al [9] reported the performance of Poly (amidoamine) (PAMAM G-0 ) dendrimer and ionic liquid composite membranes which provide a challenging way for CO 2 separation performances.…”