KEROSENE/ LIGHT DIESEL
KEROSENE/ LIGHT DIESEL
(OP)
The gap,i.e the temperature at 95% distillation of Kerosene minus the temperature of Light diesel at 5% distillation is about 4. This that the fractionation is not good, the is a good quantity of kerosene which remains in the Light diesel. Can some body give me an idea on how I can go about this.





RE: KEROSENE/ LIGHT DIESEL
Are you looking for a lab or online technique for 95% End Boiling Point analysis?
RE: KEROSENE/ LIGHT DIESEL
ASTM D 1160 Standard Test Method for Distillation of Petroleum Products at Reduced Pressure
ASTM D 2887 Test Method for Boiling Range Distribution of Petroleum Fractions by Gas Chromatography
ASTM D 2892 Test Method for Distillation of Crude Petroleum (15-Theoretical Plate Column)
ASTM D 6352 Standard Test Method for Boiling Range Distribution of Petroleum Distillates in Boiling Range from 174 to 700°C by Gas Chromatography
ASTM D 7169 Standard Test Method for Boiling Point Distribution of Samples with Residues Such as Crude Oils and Atmospheric and Vacuum Residues by High Temperature Gas Chromatography
IP 123 Petroleum Products—Determination of Distillation Characteristics
IP Standard Methods for Analysis and Testing of Petroleum and Related Products 1996—Appendix A
RE: KEROSENE/ LIGHT DIESEL
1) Reduce LGO pumparound rate
2) Reduce Kerosene draw-off rate
By doing this, you will raise the efficiency of fractionating trays between Kerosene and LGO - by allowing for higher internal reflux rates.
RE: KEROSENE/ LIGHT DIESEL
RE: KEROSENE/ LIGHT DIESEL
RE: KEROSENE/ LIGHT DIESEL
Then, running the base model against various cases and simple plotting of the pertinent variables provides great insight.
Options to consider include:
(1) Increase feed preheat
(2) Adjust pumparound / overhead reflux duties to increase internal L/V ratio in the tower section under consideration
(3) Adjust product draw rates
(4) Adjust side-stripper steam
The final answer would likely be a combination of all of the above.
You might also need to run pumparound exchanger rating calculations because, beyond a certain point, increasing circulation does not increase duty appreciably. Also, significant changes in column or furnace loading might require checking against equipment capacity limits (tray hydraulics and furnace tube metal temperature, etc.).
It's a lot of work, but that's what process engineers should do.