| 摘要 |
PURPOSE: To deliver supercritical carbon dioxide by an economical method by constituting a gaseous filling by hydrogen having higher pressure than specific pressure and supplying supercritical carbon dioxide by taking it out while maintaining pressure of the gaseous filling not lower than the specific pressure. CONSTITUTION: A bottle 1 contains a large quantity of supercritical liquid CO2 containing a certain amount of dissolved hydrogen and a filling constituted by gaseous hydrogen having pressure of about 120 bars or more. When pressure of hydrogen is reduced down to about 120 bars, it is shown by the analysis that an amount of hydrogen dissolved in liquid CO2 is small and it increases rapidly when pressure is reduced below about 120 bars. Consequently, when liquid CO2 is taken out by an immersion tube 3 to supply it to destination of use by a conduit 7, taking it out is automatically stopped by a pressure control valve 8 when pressure reduced in accordance with lowering of liquid level reaches a limit value which is not smaller than the value of about 120 bars. |
