CHEE 434 Quiz: CHEE 434 Quiz 2 2006

• School: Queen's University
• Department: Chemical Engineering
• Course: CHEE 434
• Professor: All

Document Summary

Instructions: this is a 50 minutes examination, please write your student number instead of your name on all answer booklets and sheets submitted, please state all assumptions made, calculators are permitted, this is an open-book examination. Textbooks, course notes, assignment and midterm solu- tions are allowed: please answer all questions, there are four (4) pages in the question booklet, good luck! In a continuous polymerization reactor, tank levels are tightly monitored to provide constant res- idence time for the polymer. The control of residence time is important as it directly a ects the extend of polymerization and the regulation of polymer viscosity. Loss of polymer viscosity is com- pensated by increasing the residence time in the polymerization reactor line. The simplest strategy is to increase the tank level in speci c vessels at constant owrate. You are asked to design a con- trol system for the regulation of polymer viscosity by manipulating the residence time at constant.