Study on concentrating sulfuric acid solution by membrane distillation with metal-PTFE composite membrane

Abstract

concentrating sulfuric acid by membrane distillation in a flat-sheet direct-contact membrane distillation device with a self-made metal-PTFE composite membrane has been studied. The effect of sulfuric acid concentration of feed, the flowrate and liquor temperature in high-temperature side and low-temperature side on the flux and separation efficiency is investigated. The stability of this composite membrane is also inspected. The experimental results show that the metal-PTFE composite membrane can be used in membrane distillation, and its properties are very stable. It is feasible to concentrate sulfuric acid by membrane distillation with this membrane.

Keywords

metal-PTFE composite membrane / membrane distillation / sulfuric acid