Composite Systems: Iterating Mass Balances of a Process Flow Diagram (PP3.1) (uakron.edu) You may be surprised by how easy it is to solve all the mass balances of a fairly sophisticated chemical process using the xls "iteration" feature. In about 10 minutes, you can solve an entire project complete with a reactor, distillation columns, and recycle. And if you need to change something like the reactor conversion or column splits, that will take about 3 seconds.
Comprehension Question:20kmol/h of propylene with 2kmol/hr of propane is fed with 21kmol/h of Benzene to produce Cumene (isopropylbenzene). Conversion of the propylene is 90%, but the benzene needs to be fed such that the ratio entering the reactor is 6:1 Benzene:propylene. Also 0.1 mol of diisopropylbenzene (DIPB) is produced for every mol of cumene. A flash occurs at 90C and 1.75 bars after the reactor to purge excess propane. A distillation column separates the benzene for recycle with a split of 99.5%. The cumene is recovered in the bottoms at 99%. Compute the flow rates in all the streams.
Using a Process Simulator to Draw a Process Flow Diagram (uakron.edu, 16min). You can sketch crude process flow diagrams (PFDs) by hand or using the drawing tools in Excel, but sooner or later you are going to want to make your diagrams look a bit more professional. This screencast shows how to sketch a PFD using the process simulator called ChemCAD. The procedure is similar if you are using the Aspen simulator or any other simulator.
Comprehension Questions:
1. Use a process simulator to draw the PFD associated with PP3.1 above.
2. Use a process simulator to draw the PFD associated with Hw3.5 in the textbook.
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Lira replied on Permalink
Composite Systems: Iterating
Composite Systems: Iterating Mass Balances of a Process Flow Diagram (PP3.1) (uakron.edu) You may be surprised by how easy it is to solve all the mass balances of a fairly sophisticated chemical process using the xls "iteration" feature. In about 10 minutes, you can solve an entire project complete with a reactor, distillation columns, and recycle. And if you need to change something like the reactor conversion or column splits, that will take about 3 seconds.
Comprehension Question:20kmol/h of propylene with 2kmol/hr of propane is fed with 21kmol/h of Benzene to produce Cumene (isopropylbenzene). Conversion of the propylene is 90%, but the benzene needs to be fed such that the ratio entering the reactor is 6:1 Benzene:propylene. Also 0.1 mol of diisopropylbenzene (DIPB) is produced for every mol of cumene. A flash occurs at 90C and 1.75 bars after the reactor to purge excess propane. A distillation column separates the benzene for recycle with a split of 99.5%. The cumene is recovered in the bottoms at 99%. Compute the flow rates in all the streams.
Elliott replied on Permalink
Drawing PFD's:ChemCAD
Using a Process Simulator to Draw a Process Flow Diagram (uakron.edu, 16min). You can sketch crude process flow diagrams (PFDs) by hand or using the drawing tools in Excel, but sooner or later you are going to want to make your diagrams look a bit more professional. This screencast shows how to sketch a PFD using the process simulator called ChemCAD. The procedure is similar if you are using the Aspen simulator or any other simulator.
Comprehension Questions:
1. Use a process simulator to draw the PFD associated with PP3.1 above.
2. Use a process simulator to draw the PFD associated with Hw3.5 in the textbook.