| 摘要 |
A process for selectively separating water vapour from a gaseous mixture comprises passing the gaseous mixture including water vapour along and in contact with a membrane which is selectively permeable to water vapour and wherein the water vapour permeation rate QH2O is greater than 30 Nm<3>/m<2>.hr.atm at 25 DEG C and the ratio of QH2O to the permeation rate QG of the gas or gases from which the water vapour is to be separated, i.e. QH2O/QG, is greater than 10,000. The membrane preferably has a thickness of from 0.1 microns to 50 microns. |
