Integrated manufacturing of REciclable multi-material COmposites for the TRANSport sector
Preparation, characterization, and CO2 permeation testing of cellulose acetate and polyimide blend membranes
Blend membranes of cellulose acetate and polyimide were prepared and tested for CO2/CH4 separation. Blend membranes showed enhanced CO2 permeability.Membrane?based CO2 separation is vital for various applications such as biogas upgradation. Polymer membranes are employed for CO2 separation in the industry. Polymer membranes have a trade?off between selectivity and permeability. Blending polymers is an emerging approach for altering the gas transport in the membranes. This work investigates the fabrication and characterization of blended biodegradable cellulose acetate (CA) with polyimide (PI). Thermal stability was characterized using thermogravimetric analysis (TGA) and differential scanning calorimetry (DSC), and functional groups were analyzed using Fourier transform infrared spectroscopy (FTIR). The morphology of membranes is analyzed using field?emission scanning electron microscope (FESEM). The blend membranes were tested for separation of CO2 from model biogas (CO2/CH4) at room temperature and a low feed pressure (?1.5?bar). The CA:PI blend membrane composed of 93% CA and 7% PI showed CO2 permeability of 19.71 Barrer, approximately 206% greater than pure CA, and CO2/CH4 selectivity was 9.42. Experimental results are compared with literature on CA?based membranes.HighlightsBlend membrane of cellulose acetate (CA) and polyimide (PI)CO2/CH4 gas permeation testing of membranes using a model biogas mixtureBlend membranes exhibit 206% higher CO2 permeability than pure CA membranesBlend membranes demonstrated enhanced CO2/CH4 selectivity of 9.42.
» Publication Date: 28/11/2023
This project has received funding from the European Union's Horizon 2020 research and innovation programme under grant agreement Nº 768737
