16Click to continue.

The Required Properties Input Complete dialog box appears.

Correct representation of physical properties is an essential component of process modeling. For many simulations, the only physical property specification that you must provide is the selection of an option set. The Required Properties Input Complete dialog box shows that the Aspen Plus physical property system has many optional capabilities that you can use to increase the accuracy of physical property calculations.

17Click OK to move to the next required input.

Defining Stream Conditions

The Streams FEED Input Specifications sheet appears.

For the MIXED substream, Aspen Plus requires two thermodynamic specifications, and enough information to calculate the flow rate of each component.

1 Enter the following specifications for the MIXED substream:

You can access other substreams for stream FEED by changing the substream name.

2In the Substream name field, click and select NCPSD.

3Enter the following specifications for the mixed substream:

The Streams FEED Input Specifications sheet is now complete.

4Click to continue.

The Streams | FEED | Input | PSD sheet appears. Use this sheet to define the particle size distribution for the POLYMER that you placed in the NCPSD substream.

By default, Aspen Plus uses a particle size distribution of 10 size ranges covering 20 microns each. The default size ranges are appropriate for this simulation. On this sheet, enter the weight fraction of coal in each size range.

5In the Weight fraction fields, enter the following values:

Interval Weight Fraction

60.2

70.3

80.3

90.2

6Click to continue.

The Stream | FEED | Input | Component Attr. sheet appears. On this sheet, define the component POLYMER in terms of the constituents in its GENANAL. Aspen Plus does not require you to use all 20 constituents. Since you are using only the first constituent to characterize POLYMER, the first element of GENANAL is 100%.

7In the ELEM1 field, enter a value of 100.

8Click to continue.

The Streams | HOT-N2 | Input | Specifications sheet appears. Stream HOT-N2 is the feed stream used to dry the polymer.

9Enter the following specifications for the MIXED substream:

10Click to continue.

The Streams | WASH-H2O | Input | Specifications sheet appears.

Stream WASH-H2O is the feed stream used to wash the polymer in the CCD.

11Enter the following specifications for the MIXED substream:

12 Click to continue.