Info

Figure 11.5 Selecting template and petroleum assay.
Figure 11.6 Specifications.
Figure 11.7 Components.
Figure 11.8 Crude oil assay.

In the Distillation Curve Type we use the dropdown menu to select True boiling point (liquid volume basis). In the Bulk gravity value the number 31.4 is entered in the API gravity box.

The percent distilled and temperature data for Oil-1 from Table 11.3 are entered, as shown at the bottom of Figure 11.9. The Light Ends page tab is clicked and the data from Table 11.3 is entered (see Fig. 11.10). The Gravity/UOPK page tab is clicked, and the API gravity is selected as the type. The data from Table 11.3 are entered (see Fig. 11.11).

All the assay data have been entered, and we are ready to generate pseudocomponents. Clicking the blue N button opens the window shown in Figure 11.12a. We select Specify options for generating pseudocomponents. A new browser window opens called Components Petro Characterization Generation (see Fig. 11.12b). Clicking New opens the window shown at the top of Figure 11.13, on which we enter an identification name such as "Crude1." Clicking OK opens window shown at the bottom of Figure 11.13, where OIL-1 is selected from the dropdown menu to be included. Finally the blue N button is clicked and OK is clicked on each of the windows that come up sequentially (shown in Fig. 11.14). This completes the generation of the pseudocomponents, called Assay Data Analysis.

The results can be seen by going to Components, Petro Characterization, and Results on the Data Browser. Figure 11.15 gives a partial list of the pseudocomponents. Note that each has a normal boiling point, density, molecular weight, and critical properties.

This same procedure is repeated for a second crude called Oil-2 whose assay data are given in Table 11.4. Note that this crude is somewhat lighter than Oil-1 (API gravity is 34.8 compared to 31.4 and 50% point is 450 vs. 650oF for Oil-1). We will feed both of these crude oils to a unit discussed in the following section.

We are now ready to proceed with our simulation. We will start by looking at a simple preflash column that is often used in refineries to remove some of the lightest material from the crude before sending it into the pipestill.

Figure 11.9 Crude oil basic data.
Figure 11.10 Light-ends data.
Figure 11.11 Gravity data.
Figure 11.12 Generate pseudocomponents.
Figure 11.12 Continued.

Enter ID: |CRUDE1|

Enter ID: |CRUDE1|

| © Specifications i © Simulation Options

Units-Sets | O Custom Units

1 0 Report Options

Components j 0 Specifications ffl Assay/Blend

| O Light-End Properties

¿1 21 Petro Characterization ¿1 Generation 1© CRUDE1

I © Analysis Options

| Q Property Methods

^Specifications | Cuts | Naming Options | r-Select assay/blends to be included: —

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