Article

Journal of Materials Science

, Volume 48, Issue 10, pp 3782-3788

First online:

An approach to prepare defect-free PES/MFI-type zeolite mixed matrix membranes for CO2/N2 separation

  • Jianjia YuAffiliated withNew Mexico Institute of Mining and Technology, Petroleum Recovery Research Center
  • , Liangxiong LiAffiliated withNew Mexico Institute of Mining and Technology, Petroleum Recovery Research Center
  • , Ning LiuAffiliated withNew Mexico Institute of Mining and Technology, Petroleum Recovery Research Center Email author 
  • , Robert LeeAffiliated withNew Mexico Institute of Mining and Technology, Petroleum Recovery Research Center

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Abstract

Polyethersulfone (PES) and MFI-type zeolite mixed matrix membranes (MMMs) were successfully fabricated by a novel particle suspension impregnating and solution-casting method. The effects of two different membrane preparation methods on the membrane morphology were investigated by scanning electron microscopy; the particle crystal type and distribution were explored by X-ray diffraction and fourier transform attenuated total reflectance infrared spectroscopy. The results showed that the MFI-zeolite particles were successfully synthesized, with particle diameter around 250 nm. Distribution and dispersion of MFI-zeolite particles suspended in the polymer matrix are homogeneous and uniform. The thermal analysis indicates that the glass transition temperature (T g) of MMMs is around 230 °C and the initial degradation temperature is up to 460 °C in air. The increment of T g compared to the neat PES confirms that the polymer chain rigidification is induced by zeolite particles. The MMMs have been evaluated by the CO2/N2 separation factor and permeability measured as a function of permeation temperature, the maximum separation factor of the PES/10 % MFI-silica zeolite for the pure gas reaches 35 at 25 °C.