Quality issues with catalytic gasoline
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I have been working in dry catalysis for some time now, and recently I’ve encountered some new problems. I hope that those with more experience can offer some guidance. Today, after carefully reviewing the production quality reports, I noticed that the saturated vapor pressure of the stable gasoline is 38 degrees, while its initial boiling point is 41 degrees. By comparing this with previous records, I found that sometimes the saturated vapor pressure is higher than the initial boiling point. I read about this in books before, but I can’t remember exactly; it seems that the saturated vapor pressure should be similar to the value corresponding to 10% of the product distilled, as this also indicates the engine-starting performance of the fuel. But why could the saturated vapor pressure be lower than the initial boiling point? The questions I would like to ask are: What exactly is the concept of saturated vapor pressure? What are its influencing factors? How does its value affect the quality of the fuel? And what are the basic methods for controlling saturated vapor pressure? I hope that those with expertise will kindly share their knowledge with me! Thank you!
You have a conceptual error; vapor pressure and boiling point are not the same thing – they have different units and therefore cannot be compared.
“What does it mean that the saturated vapor pressure of stabilized gasoline is 38 degrees? ? Under what circumstances is the unit of vapor pressure expressed in “degrees”? ? How to convert it to KPa? ? Could someone give me some advice?
Vapor pressure is generally evaluated using the Red Vapor Pressure (RVP), which corresponds to 100°F, or 37.8°C. The saturated vapor pressure of True VP is slightly higher
Some people have carried out fitting online, which can be used as a reference