Regarding storage equipment for supercritical fluids?
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Are there any special requirements for supercritical fluid storage equipment? What material is best to choose?
May I ask what a supercritical fluid is? L
Every substance has its critical state. The critical state refers to the condition in which a substance’s state can change within certain ranges of temperature and pressure; however, there is a critical point beyond which, no matter how the temperature or pressure changes, the state of the substance remains unchanged! A fluid in this state is a supercritical fluid! The above are all my own understandings; they’re not very professional. Relevant materials can be found in some electronic libraries!
Supercritical fluids refer to changes in the state of a fluid, such as the liquefaction of a gas. Gases generally have a critical temperature; only when the temperature is below this critical value can they be liquefied by applying pressure. Above the critical temperature, it is impossible to liquefy them no matter how much pressure is applied. Regarding the selection of design pressure and temperature for gases at critical conditions, reference can be made to Article 34 of the Pressure Vessel Regulations