PVAm/PAN复合膜的制备及其对CO_2/CH_4的分离性能

PREPARATION AND CO_2 SEPARATION PERFORMANCE OF POLYVINYL AMINE/POLYACRYLONITRILE COMPOSITE MEMBRANES

New polymeric membrane materials--polyvinyl amine (PVAm) with different primary amine contents were synthesized By covering polyacrylonitrile(PAN) ultrafiltration membranes with PVAm, the PVAm/PAN composite membranes for CO 2/CH 4 separation were prepared The composite membranes containing more primary amino groups have higher selectivity for CO 2/CH 4 The cross linking of acid or glutaradehyde could improve the gas permselectivity of the composite membranes With decreasing CO 2 content in the feed gas, the CO 2/CH 4 separation factor increased When the feed gas was 25%(vol) CO 2 and 75%(vol) CH 4, the CO 2 permeation rate was 4 1×10 -9 cm 3(STP) ·cm -2 ·Pa -1 ·s -1 , and the CO 2/CH 4 separation factor was

Polymeric membrane materials - polyvinyl amine (PVAm) with different primary amine contents were synthesized. By covering polyacrylonitrile (PAN) ultrafiltration membranes with PVAm, the PVAm/PAN composite membranes for CO2/CH4 separation were prepared. The composite membranes containing more primary amino groups have higher selectivity for CO2/CH4. The cross-linking of acid or glutaradehyde could improve the gas permselectivity of the composite membranes. With the decrease of CO2 content in the feed gas, the CO2/CH4 separation factor increased. When the feed gas was 25% (vol) CO2 and 75% (vol) CH4, the CO2 permeation rate was 4.1 × 10-9 cm3 (STP) &middot cm-2 &middot Pa-1&middots-1, and the CO2/CH4 separation factor was 180.