Novel fixed‐site–carrier polyvinylamine membrane for carbon dioxide capture

Abstract

Fixed‐site–carrier membranes were prepared for the facilitated transport of CO2 by casting polyvinylamine (PVAm) on various supports, such as poly(ether sulfone) (PES), polyacrylonitrile (PAN), cellulose acetate (CA), and polysulfone (PSO). The cast PVAm on the support was crosslinked by various methods with glutaraldehyde, hydrochloric acid, sulfuric acid, and ammonium fluoride. Among the membranes tested, the PVAm cast on polysulfone and crosslinked by ammonium fluoride showed the highest selectivity of CO2 over CH4 (>1000). The permeance of CO2 was then measured to be 0.014 m3 (STP)/(m2 bar h) for a 20 μm thick membrane. The effect of the molecular weight of PVAm and feed pressure on the permeance was also investigated. The selectivity increased remarkably with increasing molecular weight and decreased slightly with increased pressure in the range of 1 to 4 bar. © 2004 Wiley Periodicals, Inc. J Polym Sci Part B: Polym Phys 42: 4326–4336, 2004

Role of Facilitated Transport Membranes and Composite Membranes for Efficient CO2 Capture – A Review

“…This was further verified by Kim et al [30] for a PVAm composite membrane. An increase in CO 2 permeability and selectivity was found in the presence of water vapor.…”

“…Fig. 2 [30] shows the CO 2 transport mechanism by the carrier attached to the polymer backbone, facilitated by H 2 O-forming bicarbonate on the feed side interface of the membrane. CO 2 is released on the permeate side as a result of bicarbonate reacting with the protonated amine groups and Eq.…”

“…The membranes showed high CO 2 /N 2 selectivity of 160 which remarkably improved to 230 after a heat treatment, along with seven days of membrane stability. Kim et al synthesized a composite membrane from PVAm having a molecular weight of 80 000 on polysulfone support which showed high ideal selectivity of CO 2 /CH 4 (>1000) [30].…”

“…The FTMs involve reversible reactions between reactive carriers incorporated in the membrane material and a target gas molecule (here CO 2 ), and this interaction controls the gas transport rate across the membrane [28][29][30]. In various industrial processes which involve CO 2 , most feed streams are saturated with water vapor, hence CO 2 permeation will be exposed to a competitive sorption of water in the membranes [6].…”

Upgrading strategies for effective utilization of biogas

“…Kim et al [64] developed fixed-site carrier membranes by casting polyvinylamine (PVAm) on four different supports (poly (ether sulfone) (PES), polyacrylonitrile (PAN), cellulose acetate (CA), and polysulfone (PSO)). Crosslinking of the cast PVAm on the support was achieved by reacting with four solvent systems (glutaraldehyde, hydrochloric acid, sulfuric acid, and ammonium fluoride).…”