Integrated manufacturing of REciclable multi-material COmposites for the TRANSport sector
Effects of nanosilica and nanocellulose on poly(butylene adipate?co?terephthalate) nanocomposites for food packaging applications
Biogas separation using CNC/PVA?LA hollow fiber facilitated transport membranes.AbstractThe composition of biogas consists mainly of CH4 (~60%) and CO2 (40%). To be considered a clean fuel, CH4 concentration in biogas must be increased to over 95%. In this study, membranes which were stacked in a chamber were utilized to purify biogas by passing biogas over them. These membranes were composed of polyethersulfone hollow fiber substrate coated with a “selective layer” made of cellulose nanocrystals (CNC?0–2 wt) in polyvinyl alcohol (PVA) and l?arginine as a CO2 carrier. Of the different CNC concentrations in PVA?LA, CNC1/PVA?LA (1.0?wt% CNC in PVA?LA) displayed the lowest water contact angle of 17° (corresponding to higher moisture absorbing ability). With further increase in CNC concentration, even though CNC1.5/PVA?LA showed the higher crystallinity (66%), and water contact angle increased (20°); reducing the chances of facilitated transport of CO2 through it. Biogas separation experiments were conducted at 90% RH and different feed pressures (0.8–1?bar) for various CNC concentrations. Increasing the CNC concentration led to a thicker selective layer, enhancing the CO2 permeability and selectivity up to CNC1/PVA?LA. However, with the further addition of CNC, both permeability and selectivity decreased. At 90% RH and 1?bar feed pressure, the CNC1/PVA?LA setup demonstrated a CO2 permeability of 20,522 Barrer and a selectivity of 33, making it suitable for low?pressure biogas storage systems with lower energy requirements.
» Publication Date: 16/10/2024
This project has received funding from the European Union's Horizon 2020 research and innovation programme under grant agreement Nº 768737
