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23-Chem-B6 Petroleum Refining and Petrochemicals: December 2015

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

  1. Question 1 Polymerization, Crude Distillation and a Refinery-Boiler Combustion Balance
  2. Question 2 Octane Numbers, Flash Point and a Butadiene Dehydrogenation with Recycle
  3. Question 3 Characterization Factors, Visbreaking and an Ideal-Gas Tank Pressure
  4. Question 4 Alkylation Safety, Pour Point and a Distillation Split
  5. Question 5 Gasoline Properties and an Evaporator with Feed Bypass
  6. Question 6 Purpose of Refining, Product Specifications and Benzene–Toluene VLE

Start with Question 1 →

Paper format: Closed-book, 3 hours; six “Problem” blocks of equal value (20 marks each), of which five constitute a complete paper (the first five in the answer book are marked). Sub-parts (a),(b),(c)… may be treated independently; most call for concise essay answers and several require calculations with all steps shown. All six problems are solved in full below.

Reference texts: Gary, Handwerk, Kaiser & Geddes, Petroleum Refining: Technology and Economics (5th ed., CRC Press) — refinery conversion processes and product properties; Fahim, Al-Sahhaf & Elkilani, Fundamentals of Petroleum Refining (Elsevier) — cracking, treating, alkylation, characterization factors; Felder, Rousseau & Bullard, Elementary Principles of Chemical Processes (4th ed., Wiley) — material balances, recycle/bypass, combustion and gas-law calculations; Smith, Van Ness & Abbott, Introduction to Chemical Engineering Thermodynamics — Raoult’s-law VLE; supporting property data from Perry’s Chemical Engineers’ Handbook (9th ed.).