Hydrocracked diesel freezing point
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My hydrocracking unit is primarily used for producing diesel; it was originally designed to produce aviation fuel (also known as light diesel), but now aviation fuel is mixed with diesel (also known as heavy diesel) to create diesel products, commonly referred to as blended diesel. Based on the analysis samples of the mixed fuel used before, the dry point was kept between 360 and 365; the freezing point of the mixed fuel was roughly around -2. However, recently the freezing point has been around -10. Why is this? (Note: The extraction ratios of light and heavy fuel remain basically unchanged, with no significant changes in operating conditions.)
The blending of diesel is a nonlinear relationship! ! !
Reply 1# proty: After hydrocracking and isomerization of the n-alkanes in heavy diesel, SP decreases significantly, and this effect is even more pronounced with high-pressure hydrogenation.