Discuss the impact of vacuum residue on the diesel quality in coking units
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I’m not very familiar with atmospheric and vacuum distillation units; I only know that if the composition of the vacuum residue becomes lighter, and if the extraction temperature for diesel in the coking unit is not reduced, then the dry point of the diesel will be too high. So, what parameters can be used to determine that the vacuum residue components are light?
The severity of vacuum residue can be determined by analyzing its carbon residue.
It is residual carbon; a comprehensive judgment can also be made based on the fluctuations caused by operations
Please provide examples, preferably with relevant data. For example, what is the residual carbon content?
The key is to look at the residual carbon index; it can also be assisted by judging based on the extraction amount of reduced three (four-line) and the temperature.
Why has the residue become lighter and the diesel a higher dry point?