Catalysis/Catalytic cracking/Catalytic pyrolysis
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Dear senior masters, I’m a newcomer seeking clarification: what are the concepts of saturated vapor pressure and equilibrium vapor pressure, and what is the difference between them? (After reading about the concepts mentioned in the materials, I still have some doubts; please help me resolve them.)
The saturated vapor pressure is the pressure of the gas phase at a given temperature when dynamic equilibrium is reached between a liquid and the gas phase that is saturated with its vapors; at this point, the number of molecules evaporating from the liquid surface equals the number of molecules re-condensing from the gas phase. In simple terms, it is the gas pressure at which a liquid and a gas reach equilibrium at a certain temperature. The saturated vapor pressure is the gas pressure at which a substance reaches equilibrium at a certain temperature, and this pressure value remains constant over a certain period of time. This concept is somewhat similar to saturated vapor pressure, but it emphasizes that it remains constant over a certain period of time. In general, the saturated vapor pressure is the gas pressure when a liquid and its vapor are in equilibrium, while the stable vapor pressure is the gas pressure that remains constant for a given substance at a certain temperature after it has reached equilibrium. .