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Unit Operations

Diagram of a distillation tray column showing liquid flow and height difference Δh between trays

Tray Efficiency: Improve Column Performance

  • CEZ 

Discover the key differences between tray and packed columns in distillation. This guide explains efficiency metrics, pressure drop, flow range, maintenance, and typical industrial uses with a clear infographic.

Rubby formation in methanol auto-thermal reformer showing catalyst damage and silica deposition inside heat exchanger tube.

Heat Exchanger Fouling and Rubby Formation

  • CEZ 

Heat exchanger fouling in methanol plants can be a symptom of a deeper problem inside the Auto-Thermal Reformer (ATR): Ruby (or Rubby) Formation. This phenomenon occurs when impurities and hot spots weaken the catalyst support, releasing silica particles that deposit on exchanger tubes and reduce thermal efficiency. Several mitigation approaches are applied in industry — among them Steam Washing, impurity control, optimized ATR operation, and improved catalyst formulations — to limit fouling and maintain reliable plant performance.

Blue jacketed reactor used for temperature control in chemical processes

Heat Transfer Basics for Engineers

  • CEZ 

Heat transfer is a fundamental unit operation in chemical engineering, essential for energy recovery and process control. This article explains the main industrial configurations: process-to-process heat exchange, utility-based systems such as reboilers and condensers, and integrated solutions like jacketed reactors. Direct-contact cases such as cooling towers and scrubbers are also considered, showing how thermal energy is managed in real plants.

Close-up of a shell-and-tube heat exchanger used in industrial heat transfer operations

Unit Operations in Chemical Engineering: Types and Examples

  • CEZ 

The five main unit operations in chemical engineering are Heat Transfer, Mass Transfer, Mechanical Operations, Fluid Transport, and Membrane Separation. These categories form the foundation of industrial processes, from energy recovery and separation to particle handling and fluid distribution.