Help- Residence time of a reactor

[Maximilian]

Hi,

I am new here. I am introducing myself to this software. I have encountered an issue with the residence time of a reactor, For the given flow rates and the volume of the reactor (CSTR) it should be 0.17 h only. However in the simulation i am recieving a value as high as 86 h.
Can someone kindly guide me where i am being incorrect in my understanding or the simulation itself.

P:S i am also trying to use a controller, however its not working as required

Thanks in advance

Regards

[Frank R Brown III]

I suggest the following changes.
R_EtAc stream is partial vapor.
Change the specification to Pressure and Vapor Fraction. Stream temperature becomes 99.9°C
HEX_02 is a Heater
Change to Cooler Stream temperature is the same 20↑8C
Units are kmol/h
Change to mol/h to make numbers more manageable.

There is nothing wrong with the CSTR simulation.
For CSRT residence time is defined as V/F. In this case Reactor Volume = 0.5 m^3 and Feed Rate = 5.7E-3 mol/h . Residence time is 0.5/5.7e-3 = 86.7 h.
The reaction is complete, check mol/h Ethanol in Prod_1 minus Ethanol in Mix0, (0.285 - 0).

To further examine the extent of reaction in time I suggest you try a PFR. You can get a graph of conversion vs Tube length