Can you please assist with Q3
Design Memo: You are tasked to design a 100000 metric tons per annum production plant of PX. The formation of PX is obtained from the folowing polymerisation reaction and also lead to the formation of wax (by-products). Oxygen is used as an initiator to this reaction at a concentration of 50 ppm by weight 2000C+OC (PX) Eq.1
6CH + O (CH2 Table 1: Boiling Points of comp Cemponents Ethylene Oxyprn PX Wax
(Wax)
Eq. 2
Table 2: Price of components
[Cemponcets Ethyfene Osygre Way
rice(Kands)
Ouestion 1:Using the heuristic
and impurity of the peocess based on the boiling point at the atmospheric pressur Question 2: Draw the block flow diagram of the process at level 2 (Input-Output level) and write the Mass Balance (MB) (write each process stream as a function of the conversion X of the limiting reactant). Question 3:Calculate the Economic Potontial (EP) at input-Output level using your results in question 2 and prices in Table 2. Plot the EP versus X and decide on the value of the required ronversion for your process to be financially sustainable (Justify). What is the value of the selectivity at the sustainable EP?
Duestion 4:Using the conversion in question 3 finalise the MB at input-output level
Componcnt Mass Flowrate-In, kg/h Ethylene Oxygen PX Wax
Mass Flowrate-Out,kg/h
Qwestiem 5 calculate the volume of a PFR reactor (in m) (no pressure drop, Isothermal reaction) to achieve the conversion obtained in Question 3 if the reaction rate for thermal initiation of ethylene is given by: T = k,C Eq. 3 Where the rate constant is k=8.210-exp [(84000+47P)] 8.3147 Eq. 4
Where, p 300MPa =500K Average te R = 8314 MPa.dm3/moLK
here oxygen decomposed)
Question 6: By plotting and looking at the Levenspiel Plot, do you PFR in question 5 (discuss)?
NB: The assignment is due on Friday 28 April 2023 on Ulwazi