PBA Column Loading: Oper. Conds Tab

PBA_DetailedColumnLoadOperConds.jpg

This tab appears on the interface dialog of the following operation:

      Packed Bed Adsorption (PBA) Column Loading

Variable Definitions, Ranges and Default Values

The following table shows a brief description of the variables appearing in this tab. The table also displays their default values and their generally acceptable range:

Variable

Default Value

Range

 

 Binding Capacity (g/L)
The resin’s binding capacity expressed in mass of retained components per volume of resin.

20.0

Positive

 Capacity Utilization (%)
The percentage of the resin’s binding capacity that is utilized by this operation.

100.0

0 - 100

Loading Time (min)
The actual duration of the operation (per cycle).

30.0

Positive

Linear Velocity (cm/h)
The linear velocity of the feed in the resin.

300.0

Positive

Absolute Flowrate (L/h)
The volumetric flowrate of the feed in the resin.

0.0

Positive

Relative Flowrate (BV/min)
The volumetric flowrate of the feed in the bed (resin) expressed as number of bed volumes per time unit.

30.0

Positive

Empty Bed Contact Time (h)
The amount of time it takes for a feed volume of material to flow through an empty bed.

0.0

Positive

 Absolute Loading Volume (per Cycle, per Unit) (L)
The loading volume per cycle and per equipment unit.

0.0

Positive

 Relative Loading Volume (per Cycle, per Unit) (BV)
The loading volume per cycle and per equipment unit, expressed as number of bed volumes.

0.0

Positive

Retained %
The percentage of inlet mass that is retained in the resin for each component.

0.0

0 – 100

 Retained Amt (kg)
The retained mass in the resin for each component.

0.0

Positive

Ignore in Sizing?
Check the box next to a component to ignore the corresponding retained % in equipment sizing calculations.

No

Yes/No

Outlet Stream Name
Indicates the output port that is connected to the waste outlet stream. Click on the list box to bring up a list of available output ports in order to select one.

Out #8

Any Output Port

Symbol Key: User-specified value (always input); Calculated value (always output); Sometimes input, sometimes output

Specification Choices / Comments

The following list describes the available specification choices in this tab; for more details on how these are implemented, see PBA Column Loading: Modeling Calculations.

Loading Time Options...

The loading time can be either set by the user or calculated by the program based on the loading flowrate.

Loading Flowrate Options...

If the loading time is calculated based on loading flowrate, then you can choose among four different options for specifying the loading flowrate: you can specify the feed’s linear velocity, or its volumetric flowrate, or its relative flowrate (in bed volumes) in the bed, or the empty bed contact time (the amount of time it takes for a feed volume of material to flow through an empty bed). Any variable that is not specified will be calculated by the program.