A having a mid-boiling point A
F. Repeat for the next adjacent component and
continue until the whole curve is divided into these mid-boiling point components.
Mid-volume Percentage Point Components
Sometimes the assay has been so constructed as to correlate the crude oil properties
against components on a mid-volume percentage basis. In using such data as this,
the TBP curve is divided into mid-volume point components. This is easier than the
mid -boiling point concept and requires only that the curve be divided into a number
of volumetric sections. The mid-volume figure for each of these sections is merely
the arithmetic mean of the volume range of each component.
Using these definitions the determination of the product properties can proceed
using the distillation curves for the products, the pseudo component concept, and
the assay data. This is given in the following discussion.
Predicting TBP and ASTM Curves from Assay Data
The properties of products can be predicted by constructing mid-boiling point
components from a TBP curve and assigning the properties to each of these
components.
Temperature
Comp ‘B’
Comp ‘A’
Mid BPT
Point
A
Vol %
Mid BPT
Fig. 2 Example of
mid-boiling points
16
D.S.J. Jones
F. Repeat for the next adjacent component and
continue until the whole curve is divided into these mid-boiling point components.
Mid-volume Percentage Point Components
Sometimes the assay has been so constructed as to correlate the crude oil properties
against components on a mid-volume percentage basis. In using such data as this,
the TBP curve is divided into mid-volume point components. This is easier than the
mid -boiling point concept and requires only that the curve be divided into a number
of volumetric sections. The mid-volume figure for each of these sections is merely
the arithmetic mean of the volume range of each component.
Using these definitions the determination of the product properties can proceed
using the distillation curves for the products, the pseudo component concept, and
the assay data. This is given in the following discussion.
Predicting TBP and ASTM Curves from Assay Data
The properties of products can be predicted by constructing mid-boiling point
components from a TBP curve and assigning the properties to each of these
components.
Temperature
Comp ‘B’
Comp ‘A’
Mid BPT
Point
A
Vol %
Mid BPT
Fig. 2 Example of
mid-boiling points
16
D.S.J. Jones