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

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

  1. Question 1 Steam Reforming, Carburetion and an Evaporator with Bypass
  2. Question 2 Alkylation, Naphtha Cracking and a Coke Furnace
  3. Question 3 Crude Refining, Product Specifications and SO₂ Absorption
  4. Question 4 Cloud Point, Hydrogen Production, API Gravity and a Blend Density
  5. Question 5 Gasoline Properties, Solvent Dewaxing and a Reflux Ratio
  6. Question 6 Pour Point, Antiknock Additives, Hydrogen Recovery and a Benzene-Hydrogenation Recycle

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 parts call for concise essay answers; several require calculations with all steps shown. All six problems are solved below.

Reference texts: Gary, Handwerk, Kaiser & Geddes, Petroleum Refining: Technology and Economics (5th ed., CRC Press) — refinery processes and product properties; Fahim, Al-Sahhaf & Elkilani, Fundamentals of Petroleum Refining (Elsevier) — hydrogen production, cracking, treating, alkylation; Felder, Rousseau & Bullard, Elementary Principles of Chemical Processes (4th ed., Wiley) — material balances, recycle, combustion and gas-law calculations; supporting property data from Perry’s Chemical Engineers’ Handbook (9th ed.).