Regeneration of the Absorbent by the PTFE Hollow Fiber Membranes Using Vacuum Membrane Regeneration Technology

摘要

The polytetrafluoroethylene (PTFE) hollow fiber membranes were prepared through a cold pressing method including paste extruding, stretching and sintering in this study. Membrane vacuum regeneration technology (MVR) was developed as a novel regeneration technology for regeneration of the absorbent. The membrane structures of the PTFE hollow fiber membranes were investigated. The mixture of N-methyldiethanolamine and piperazine was selected as the absorbent. The PTFE hollow fiber membranes were used for regeneration through vacuum membrane regeneration technology. The CO_2 regeneration flux and regeneration ratio increased with the increase of the regeneration temperature and the CO_2 loading. The regeneration pressure was negative to the regeneration flux and regeneration ratio. When the flow rate of the rich solution increased, the regeneration ratio decreased and CO_2 regeneration flux increased significantly.