Information Technology Reference
In-Depth Information
10.8 RBatch BLOCK
The RBatch block is designed to evaluate the performance of a batch or semibatch
reactor. The basic describing equations involve the equality of the rate of accumu-
lation of a product or reactant within the reactor to the rate of gain or loss due to
chemical reaction. Solution is by integration as a function of time. An overall energy
balance as a function of time is also employed. Details may be found in Levenspiel
(1962).
The initial setup for Rbatch is shown in Figure 10.20, in which the reactor oper-
ating and pressure specifications may be selected. Each of the specifications brings
up unique entry requirements, as shown in Figure 10.21. It is also important to note
that a specification for valid phases is required. If vapor-liquid-liquid is chosen, the
second liquid button provides a means of identifying the second phase, as shown in
Figure 10.22.
Selection of the tab Stop Criteria permits a wide variety of possibilities for the
selection of a means of stopping the reaction as shown in Figure 10.23. More than
one stop criterion may be selected. Various drop-down lists, such as variable type,
are available as needed. Figure 10.24 shows the options dealing with batch cycles
and control of the number and interval of the results of the simulation. For this
example, Figure 10.25 shows mole fractions of each component as a function of
time. Additional results, as a function of time, may be found under the tabs Over-
all and Feed. The complete example setup and solution are available at Examples/
RBatchExample1.
Figure 10.20
RBatch initial setup.
