How can the dry point of aviation fuel be effectively controlled?
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Recently, the properties of the feedstock used in our hydrocracking unit have changed, which has led to a reduction in the amount of feedstock supplied. However, the tail oil produced by our unit is sold to other companies as raw material for lubricants, and such lubricants require a certain viscosity level. With less feedstock being supplied, the degree of reaction increases, resulting in a lower viscosity of the tail oil. The companies that purchase this tail oil consider its viscosity to be unsuitable, but our unit needs to maintain a specific dry point for the jet fuel, which requires a larger quantity of tail oil since the bottom of the jet fuel tank is heated using this tail oil. Is there any effective way to address these conflicting requirements? I earnestly ask some expert for guidance!
1. A change in the properties of the raw materials does not mean that the feed volume will decrease. 2. For tail oil, it is the viscosity index that matters, not the viscosity. 3. The degree of reaction depth can be controlled. This approach is not contradictory at all: by reducing the reaction depth, the amount of residual oil increases, which in turn reduces the amount of jet fuel extracted. This will stabilize the temperature at the bottom of the jet fuel tank.