This module provides a clear, refinery-walkthrough overview of the major petroleum refining processes. The objective is to help you “follow the barrel” from crude receiving through distillation, conversion, treating, and supporting systems, while keeping the discussion practical and connected to how a refinery makes money.

After completing this module, one should be able to:

• Describe the purpose of each major refinery unit,
• Identify where separation ends and chemical conversion begins
• Explain why treating and hydrogen management are essential for modern fuels
• Connect unit decisions to refinery profitability and clients pain points