| 摘要 |
<p>A membrane electrolysis cell is described, comprising one anodic compartment (2) and one cathodic compartment (7), wherein at least one of the two compartments contains a gas diffusion electrode (10) and a planar porous element (9) is interposed between the membrane (16) and the gas diffusion electrode (10). A flow of electrolyte (13) fed from the inside of the electrolyser crosses the porous planar element downwards by gravity. The membrane/planar element/gas diffusion electrode assembly is kept under compression by the current distributor of the gas diffusion electrode in the case the distributor lays on flexible supports. In this case the other electrode of the cell is rigid. Alternatively, the pressure of the compartment containing the gas diffusion electrode is maintained at a lower level than that of the other compartment. This pressure differential pushes the membrane which in turn presses the planar element and the gas diffusion electrode against the current distributor, in this case laying on rigid supports. When the gas diffusion electrode is the cathode and the gas contains oxygen, the cell is particularly useful for chlor-alkali electrolysis.</p> |
