Does the Watson characteristic factor (K) change with changes in the phase state of petroleum components?
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For example, a petroleum component with a fixed composition has its Watson characteristic factor (K), but if the temperature rises and all of it turns into a gas, will the Watson characteristic factor (K) change and whether K is meaningful for the gas phase? I don't understand. I hope you can tell me.
It’s really tiring to answer your question very professionally, haha. http://books.google.com/books?id=BZOPlA-SmMUC&pg=PA11&dq=uop+k+factor&hl=zh-CN#PPA11,M1 Look at the professional explanation below: Nelson (1966) pointed out the truth of the latter statement in an interesting graph of characterization factor vs. boiling point, shown in Figure 2-3. (This is in the book, I don’t know if I can upload the picture). The characterization factor, CF, also called the UOP or Watson characterization factor, UOP K, is defined as the cube root of the boiling point of a compound (in degrees Rankine) divided by the specific gravity, SG, of the liquid at 60 F (referred to water at 60 F). CF=UOP K=(Tb+459.67)^(1/3)/SG(@60 F)/60 F. where Tb=normal boiling point, F. The UOP K or characterization factor should not be confused with the K factor used in vapor/liquid equilibrium calculations. The two K's are completely different.
Now you understand whether the value of UOP K changes with temperature?
How to map the map upward? I didn't find a way. Haha. But let me tell you, the UOP K value increases.
The UOP K or characterization factor should not be confused with the K factor used in vapor/liquid equilibrium calculations. The two K's are completely different Does this sentence mean that the K of the gas and the K of the liquid are different in the gas-liquid equilibrium state? If the K of the liquid petroleum component is known, can the K of the gas of the same composition be calculated? In short, knowing the pressure, temperature and composition of the gas, how to calculate its K?
The characteristic factor K of crude oil, also known as Watson K or UOP (universal oil product Co.), is a function of the average boiling point and relative density of oil products. It is related to the family composition of crude oil and has nothing to do with the state and environment. The maximum for alkanes is 12.7, for cycloalkanes it is 11 -12, and for aromatics the minimum is 10 - 11. Therefore, it is an important parameter to characterize the composition of oil products.
To be honest, the equilibrium constant K and the characteristic factor K are different!