A "Packed Bed" is a type of equipment used in chemical engineering and industrial processes. It consists of a vertical column filled with solid particles, often called packing material. The purpose of the packed bed is to facilitate contact between a gas or liquid and the solid particles, enhancing mass transfer and reaction rates. Packed beds are commonly used in applications such as absorption, adsorption, and catalysis. The design allows for efficient flow of fluids through the packed material, making it ideal for processes like gas purification and chemical reactors. Proper selection of packing material is crucial for optimizing performance.