In-situ synthesis of ZIF-8 on mixed matrix PDMS membrane for enhanced desorption of CO2 from dimethyl carbonate

Nowadays, Carbon capture and storage (CCS) are widely studied as a way of reducing greenhouse emissions and slowing down global warming . Integrated solvent absorption-membrane desorption is a novel CO 2 pre-combustion capture technology with the advantage of relatively low energy cost. Herein, the mixed matrix membranes (MMMs) were synthesized through a facile in-situ method for enhanced desorption of CO 2 from dimethyl carbonate (DMC). ZIF-8 nanoparticles were synthesized in situ on polydimethylsiloxane (PDMS). The morphology, microstructure and thermal stabilities were studied by scanning electron microscopy (SEM), X-ray diffraction (XRD), Fourier transform infrared (FTIR) and thermal gravimetric analyzer (TGA). Results revealed that fabrication of ZIF-8 nanoparticles on PDMS matrix greatly increased CO 2 flux of the membrane without any leakage of DMC. The membrane showed superior performance with increase of temperature and feed pressure. In particular, PPM-4 exhibited the highest CO 2 flux of 2670 g/ m 2 ·h at 0.4 MPa (20 °C) with the feed flow rate of 0.8 L/min. It was found that the use of DMC absorption-PDMS membrane desorption technology significantly reduces the cost of CO 2 capture. The enhanced performance of this combination of a new absorbent and mixed matrix membranes will open new routes for future CO 2 capture systems.