Separation of Water and Glycol by Vacuum Membrane Distillation (VMD)

In the present paper feasibility of VMD for concentration of glycol from used coolant liquid is presented. VMD experiments were performed with water-ethylene glycol (EG) mixtures, using a flat sheet Polypropylene (PP) membrane at various temperatures and recirculation rates. Results show that the membrane rejects almost completely EG and desired concentration is achieved. This is due to the fact that vapor pressure of EG is negligible compared with that of water. Increasing temperature and recirculation rate increases flux with no effect on EG rejection.

کلیدواژه ها:

Vacuum Membrane Distillation ، Ethylene Glycol ، Polypropylene Membrane