The effect of pressure in the hydrorefining reaction process
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I would appreciate it if everyone could help explain this: “Gasoline is generally in the gas phase under hydrorefining conditions, and increasing the pressure prolongs the residence time of gasoline.” My personal understanding is that as pressure increases, the hydrogen partial pressure rises while the oil partial pressure decreases, resulting in a shorter contact time between oil molecules and the catalyst. I don’t know what’s wrong; I need help!
I think increasing the pressure prolongs the residence time of gasoline, and that’s because higher pressure controls the air velocity, thereby extending the gasoline’s residence time!
The partial pressure of oil and gas has also increased; you don’t understand it correctly – the person on the second floor is right
PV=nRT; as the total pressure increases, the partial pressure of oil also increases, and when nRT remains constant, V decreases. Space velocity = volumetric flow rate/catalyst bed volume; as the space velocity decreases.
Thank you all for sharing your insights! I’m still ignorant:( 1. Isn’t the partial pressure of oil and gas simply the product of the molar fraction and the total pressure? The total pressure increased, but the molar fraction of oil and gas in the system also decreased! How can we be sure that the partial pressure of oil and gas must also have increased? 2. “The ideal gas law can be expressed as pV=nRT, where p is the pressure, V is the volume of the gas, T is the temperature, n is the amount of substance of the gas, and R is the molar gas constant (also known as the universal gas constant).” But in our case, the increase in pressure occurs due to the addition of new hydrogen, so the amount of substance of the gas, n, has changed, right? Can it still be applied?