PBA Column Loading: Oper. Conds Tab

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.