Condensation point and cold filter plugging point of coker diesel

This post was last edited by percy on 2015-11-22 07:49. The freezing point refers to the highest temperature at which, under specified test conditions, the surface of the cooled oil sample stops moving; it is always expressed in °C. 　　Freezing point and cold filter plugging point are important indicators for characterizing the low-temperature performance of diesel. The freezing point (SP) is the highest temperature at which diesel loses its fluidity in low-temperature conditions ； 　　The Cold Filter Plugging Point (CFPP) indicates the highest temperature at which diesel can cause clogging of the filters in a diesel engine’s fuel supply system. For light diesel, the cold filter plugging point is a more important indicator than the freezing point in practical use. This is because the cold filter plugging point is directly related to the low-temperature performance of diesel, whereas the freezing point is mainly associated with the storage and transportation of diesel. Coking is a thermal cracking reaction, as the pour point and cold filter plugging point of diesel are related to its composition. Raising the coking temperature and lowering the dry point of diesel can reduce its freezing point and cold filter plugging point.

It was explained in great detail upstairs; after making process adjustments, it is also possible to add products such as diesel pour point depressants online, thereby reducing the cold filter plugging point without affecting sales. You can contact me for details

Under normal conditions (not in winter), the 95% point of coker diesel is generally kept at or below 365°C, with a maximum of 367°C being acceptable. This is because the 95% point increases by 3–5°C after the diesel undergoes hydroprocessing. During production in winter, the 95% point is usually controlled to be at or below 360°C. The adjustment range varies depending on the properties of the raw materials; additives such as antifreeze agents can also be used to adjust the cold filter point, with adjustments made based on cost-benefit analysis. I hope my answer can help you.

Depending on your diesel, the degree of reduction varies.

Coker diesel is a semi-finished diesel product; after hydroprocessing, both the freezing point and cold filter plugging point of this diesel increase. Controlling its quality depends on the requirements for the quality of the diesel after hydroprocessing. Coking units can regulate the temperature at the diesel extraction point in order to reduce the content of heavy components in the diesel, thereby lowering the freezing point and cold filter plugging point of the diesel after hydroprocessing. It is also possible to add blending agents to the diesel after hydroprocessing, and this approach is more cost-effective than reducing the yield