Several methods can be employed for chemical washing, including:
Acid washing - Utilizes acidic solutions to dissolve and remove metal oxides and other inorganic deposits. Base washing - Employs alkaline solutions to neutralize acids and remove organic contaminants. Solvent washing - Uses organic solvents to dissolve and remove organic impurities. Steam washing - Involves the use of steam to clean the catalyst surface, often combined with other chemical agents.
