What are the factors affecting the cold filter plugging point of diesel?
2 Answers
Factors affecting the cold filter plugging point of diesel include the composition of diesel (content of straight-chain alkanes). Brief introduction of factors: High density generally leads to an increase in alkane content after hydrogenation, resulting in a rise in the cold filter plugging point temperature. The presence of reforming agents in the reaction can reduce the pour point and lower the cold filter plugging point temperature. Alternatively, the 95% point of diesel can be reduced during atmospheric diesel extraction (reducing density), or pour point depressants can be added to the diesel. Diesel cold filter plugging point: The cold filter plugging point of diesel refers to the lowest temperature at which a diesel sample, cooled under specified conditions, is drawn under a pressure of 1961Pa (200mm water column) to pass through a 363-mesh filter, and the filter is blocked to the point of no flow or the flow rate is less than 20ml/min.
As a long-haul truck driver with years of experience, I must say the cold filter plugging point issue with diesel is really annoying, especially during harsh northern winters. The main influencing factors include the wax content in the diesel itself - higher wax content makes it more prone to congealing at low temperatures, clogging the filter and preventing engine start. Secondly, there's the quality of additives - some cheap additives don't work and actually accelerate crystallization. Then there's storage conditions - prolonged storage increases the risk of separation and deterioration. I've experienced several instances where my truck wouldn't start in -10°C weather, only to find out I'd filled up with low-quality diesel. Now I always use premium brand low-pour-point diesel, add flow improvers before winter, and replace old filters. This approach gives me peace of mind and safety, makes driving much smoother, and eliminates worries about breakdowns affecting delivery schedules.
