Unit Operations ((top)) -

These involve the physical manipulation of solid materials.

While chemical reactors (Unit Processes) change the chemical structure of materials, Unit Operations primarily deal with —specifically, the transfer of energy (heat), mass, or momentum. They function as the modular blocks of a process flow diagram (PFD), arranged in a specific sequence to achieve the desired product specification. unit operations

Absorption: Using a liquid to "soak up" a gas (e.g., removing CO2 from air). These involve the physical manipulation of solid materials

While there are hundreds of specific operations, they generally fall into five functional categories: Absorption: Using a liquid to "soak up" a gas (e

are the basic, individual steps that make up a complex chemical or physical process. Instead of looking at a factory as one giant machine, engineers break it down into these modular building blocks to design and scale production efficiently.

Unit operations are generally classified based on the primary physical phenomena involved.

By isolating these steps, engineers can apply consistent scientific principles and design equations to a wide variety of industries. A distillation column used in a petroleum refinery operates on the same thermodynamic principles as one used in a whiskey distillery.