An approach to prepare defect-free PES/MFI-type zeolite mixed matrix membranes for CO2/N2 separation |
| |
Authors: | Jianjia Yu Liangxiong Li Ning Liu Robert Lee |
| |
Affiliation: | 1. New Mexico Institute of Mining and Technology, Petroleum Recovery Research Center, Socorro, NM, 87801, USA
|
| |
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. |
| |
Keywords: | |
本文献已被 SpringerLink 等数据库收录! |
|