− rIPA = k1CIPA where
mol IPA m3 catalyst ⋅ s m 3 gas m 3 catalyst ⋅ s
60,000 k1 = 1.76 × 10 exp − RT mol IPA CIPA = m 3 gas 5
These kinetics are only valid if the actual conversion does not exceed 85% of the equilibrium conversion at reactor conditions. Although, several side reactions are possible, none of them take place to any considerable extent. The activation energy in the kinetic expression above is in units of kJ/kmol.
Catalyst physical properties are given below: density of the inert catalyst, ρci = 2500 kg/m3 density of solid catalyst, ρc = 2500 kg/m3 packed bed voidage of the cylindrical pellets = 0.5 void fraction of the spherical particles at minimum fluidizing conditions = 0.55 particle diameter, dp = 100 µm
For heat exchangers with multiple zones, it is recommended that you simulate each zone with a separate heat exchanger. Actual equipment may include several zones, so costing should be based on the actual equipment specifications. On your PFD, only the actual equipment should appear. For the distillation columns, you should use the shortcut method (SHOR) to get estimates for the rigorous distillation simulation (TOWR or SCDS). The shortcut method may be used until an optimum case is near. It is then expected that everyone will obtain a final design using rigorous simulation of the columns. For an absorber, shortcut calculations are not possible. When simulating a process using “fake” streams and equipment, it is absolutely necessary that the process flow sheet that you present not included any “fake” streams and equipment. It must represent the actual process.
General Optimize the process using decision variables of your choosing. You should choose as decision variables the design variables most strongly affecting the objective function. ChE 112 – Separations Determine the number of distillation columns required, their location, and enough information for each distillation column to cost it. The distillation column that provides the acetone product should be designed in detail. Additionally, if you choose to recover acetone from the flash vaporizer vapor stream by scrubbing with water (must be deionized) or any other solvent, that absorber must be...