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23-Chem-A4 Chemical Reactor Engineering: May 2014

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

  1. Question 1 Ethyl-Acetate Saponification in a CSTR (and Two in Series)
  2. Question 2 Optimum Temperature for a Reversible Exothermic Isomerization
  3. Question 3 Acetaldehyde Decomposition — Batch Kinetics and a PFR
  4. Question 4 Second-Order Reaction in Two Unequal CSTRs — Ordering and Parallel
  5. Question 5 Phosphine Decomposition in a Plug-Flow Reactor

Start with Question 1 →

National Exams / EGBC — May 2014 — 04-Chem-A4 Chemical Reactor Engineering. Three-hour open-book exam; the designated Fogler textbook, 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 design equations are quoted from Fogler and applied. Property data not printed on the paper (gas constant in imperial units, Rankine conversion) are stated explicitly in each Given block as open-book look-ups.

Reference texts: H. S. Fogler, Elements of Chemical Reaction Engineering (4th/5th ed., Prentice Hall) — the designated open-book text: CSTR/PFR/batch design equations, gas-phase reactions with change in moles, reversible reactions and optimum temperature progression; O. Levenspiel, Chemical Reaction Engineering (3rd ed., Wiley) — reactor-staging (CSTRs in series/parallel) and the optimum-temperature-progression arguments; supporting property data from Perry’s Chemical Engineers’ Handbook (9th ed.).