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23-Chem-A4 Chemical Reactor Engineering: December 2014

Nivaar worked solution (AI-drafted; not reviewed by a licensed engineer)

  1. Question 1 Enzyme Hydrolysis of Sucrose — Michaelis-Menten Constants
  2. Question 2 Reactor Sizing from Rate-Concentration Data
  3. Question 3 Autocatalytic Reaction — PFR, MFR and Minimum-Size Train
  4. Question 4 Parallel Reactions — Reactor Choice for Selectivity
  5. Question 5 CSTR Kinetic Determination for a Mole-Changing Gas Reaction

Start with Question 1 →

National Exams / EGBC — December 2014 — 04-Chem-A4 Chemical Reactor Engineering. Three-hour open-book exam; the designated Fogler textbook (any edition), unit-conversion / mathematical tables and a non-communicating programmable calculator are permitted. Five questions are printed and any four constitute a complete paper (each worth 20 marks); all five are solved below for completeness. No credit is given for re-deriving standard rate expressions, so the batch / PFR / CSTR design equations are quoted and applied. These are Levenspiel-style graphical / analytical reactor problems (enzyme kinetics, rate-data analysis, autocatalytic staging, parallel-reaction selectivity, and CSTR kinetic determination).

Reference texts: O. Levenspiel, Chemical Reaction Engineering (3rd ed., Wiley) — batch/MFR/PFR design equations, the graphical “$1/(-r_A)$ vs $C_A$” area method, autocatalytic optimum staging, product distribution for parallel reactions, and constant-volume CSTR kinetic analysis; H. S. Fogler, Elements of Chemical Reaction Engineering (4th/5th ed., Prentice Hall) — the designated open-book text: stoichiometric tables with the expansion factor $\varepsilon$, gas-phase reactions with change in moles, and reactor sizing; supporting property data from Perry’s Chemical Engineers’ Handbook (9th ed.).