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23-Chem-A5 Chemical Plant Design and Economics: December 2017

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

  1. Question 1 Process Synthesis — Cleaning Air of SO₂ and NO₂ with a Regenerable Mg(OH)₂ Scrubber
  2. Question 2 Minimum Selling Price for a 20% Return on Investment
  3. Question 3 Inherently Safer Design (ISD) and Inherently Safer Predesign (ISPD)
  4. Question 4 Overall Procedure for Chemical Reactor Design
  5. Question 5 Sections of a Material Safety Data Sheet (MSDS / SDS)
  6. Question 6 Treatment and Disposal of Process Wastes

Start with Question 1 →

National Exams — December 2017 — 16-Chem-A5 Chemical Plant Design and Economics. Three-hour, closed-book exam; one two-sided aid sheet and an approved calculator permitted. Six questions are offered; five (5) of equal value (20 marks each) constitute a complete paper and only the first five in the answer book are marked. All six questions are solved below for completeness. The paper is one economics calculation (Q2) plus a process-synthesis design (Q1) and four qualitative process-design / safety questions (Q3–Q6). Property data not printed on the paper (straight-line depreciation convention, WHMIS/GHS section list) are stated explicitly where used.

Reference texts: Turton, Bailie, Whiting, Shaeiwitz & Bhattacharyya, Analysis, Synthesis, and Design of Chemical Processes (4th ed., Prentice Hall) — process synthesis, profitability analysis and waste treatment; Peters, Timmerhaus & West, Plant Design and Economics for Chemical Engineers (5th ed., McGraw-Hill) — capital/operating cost and return-on-investment analysis; Towler & Sinnott, Chemical Engineering Design (2nd ed., Butterworth-Heinemann) — reactor-design procedure and waste management; Crowl & Louvar, Chemical Process Safety (4th ed., Prentice Hall) — inherently safer design and SDS content.