The predefined CSTR,
Batch, and
Semibatch reactor types available in the Reaction Engineering interface set up equations describing how species concentrations in a perfectly mixed system change with time.
Time Dependent is the correct study type to use for these reactor types. The simulation time is specified in the settings of the
Time Dependent study step.
The predefined Plug flow reactor type sets up equations for stationary conditions describing how species molar flow rates (SI unit: mol/s) vary with the reactor volume.
Stationary Plug Flow is the correct study type to use for this reactor type. The reactor volume is specified in the
Stationary Plug Flow study step feature
Note that selecting the Reaction Engineering interface and the
Time Dependent study sets up the
Batch, constant volume reactor type by default. The
Time Dependent study is also suitable for all
CSTR reactors and the
Semibatch reactor. However, if the reactor type is changed to
Plug flow, then the Time Dependent study step needs to be replaced with a
Stationary Plug Flow step. Combining a Reaction Engineering interface with the
Stationary Plug Flow study does not set up a
Plug flow reactor type by default. In that situation, the
Plug Flow reactor type needs to be set manually in the Reaction Engineering interface.