Question 1. Without recycling.
a. Calculate the chemical concentrations in reactor as function of reactor length. Plot the results.
b. What is the optimal length to maximize P1?
Question 2. Stream U5 is recycled into the reactor (mixed with feed).
Assuming steady process:
a. Determine the optimal reactor length to maximize P1.
b. Based on the prices and operation costs, determine the optimal length to maximize the profit.
Question 3. Considering the new setup:
The 2nd vaporizer can remove some water in U3 before recycling. Can the new process be more profitable than the previous one?
Question 4. There are several ways you could have solved this problem in Excel. Outline some of the possibilities you considered and briefly explain why you chose the approach you did.