Diesel fuel distillation curve

The products could be classified as a function of various criteria physical properties (in particular, volatility), the way they are created (primary distillation or conversion). Nevertheless, the classification most relevant to this discussion is linked to the end product use LPG, premium gasoline, kerosene and diesel oil, medium and heavy fuels, specialty products like solvents, lubricants, and asphalts. Indeed, the product specifications are generally related to the end use. Traditionally, they have to do with specific properties octane number for premium gasoline, cetane number for diesel oil as well as overall physical properties such as density, distillation curves and viscosity. 

FIGURE 4.10 Typical distillation curve for (a) predominantly gasoline with trace heavy residual fuel oil and (b) predominantly gasoline with a middle distillate of diesel fuel. 

Figure 5 Distillation curves for a number 2 diesel fuel and pyrolysed methyl ester...

The Calculated Cetane Index (CCI), though not an accurate predictor of Cetane Number for biodiesel, since it is based on a calculation using specific gravity and the distillation curve, was used to estimate the Cetane Number of the biodiesel and two diesel fuels. From the results it can be seen that biodiesel has a CCI value higher (55) than that of diesel No.2 (49). This accords the biodiesel with better cold-start properties, minimizes the formation of white smoke (emissions), and leads to less engine noise and hence improved engine durability and reduced fuel consumption. ... 

As we mentioned before, the number of cut-point ranges is arbiharily defined. Kaes [32] states that it is necessary to perform a sensitivity test to study the relationship of the side draw rate to the side draw temperature and the associated distillation curve to ensure that the defined BP-based pseudocomponents are able to provide reasonable results. If the relationship is stepwise rather than continuous, the number of BP-based pseudocomponents needs to be redefined. In this work, we cut the reactor model effluent into 20 TBP pseudocomponents to represent the feed to fractionators. To run the sensitivity test, we change draw rates of diesel fuel to investigate the relationship among draw rates, draw temperatures, and distillation curves of products. 

Figure 6.25 Relationship between the draw rate and the distillation curve of diesel fuel (even cut-point range method).

We apply Equations (6.25)-(6.28) to estimate the flash points and freezing points of diesel ful in MP HCR process and jet fuel in HP HCR process by models predictions on distillation curve, specific gravity, and MeABP. 

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