Download or read book Facilitated Transport Membranes for Carbon Capture from Flue Gas and H2 Purification from Syngas written by Yang Han (Membrane scientist) and published by . This book was released on 2018 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Polymeric facilitated transport membranes (FTMs) driven by reversible amine-CO2 reactions were developed in this study for selective CO2 separation from flue gas (CO2/N2) and syngas (CO2/H2). For post-combustion carbon capture, a FTM was synthesized in a composite membrane configuration with a 170 nm selective layer coated on a nanoporous substrate. In the selective layer, polyvinylamine with amine-sites covalently bonded to the polymer backbone was used as fixed-site carrier and an amino acid salt, synthesized by deprotonating sarcosine with 2-(1-piperazinyl)ethylamine, was blended as mobile carrier. Multi-walled carbon nanotubes wrapped by a copolymer poly(vinylpyrrolidone-co-vinyl acetate) were dispersed in the selective layer as reinforcement fillers to refrain the selective layer penetration upon vacuum suction. The membrane demonstrated a CO2 permeance of 1451 GPU (1 GPU = 10-6 cm3(STP)·cm-2·s-1·cmHg-1) and a CO2/N2 selectivity >140 at testing conditions relevant to this separation modality. A field trial with 1.4 m2 spiral-wound membrane modules fabricated from this FTM was conducted with actual flue gas at National Carbon Capture Center in Wilsonville, AL. The separation performances of the modules agreed well with those of the lab-scale flat-sheet membranes. A 500-h stability was demonstrated in spite of the interference of system upset and flue gas outage.