a picture of a diagram that shows the steps of an immigration method

The four common methods of catalyst preparation are:Impregnation MethodCo-precipitation MethodSol-Gel MethodVapor Phase MethodDetailed Explanation of the Impregnation Method:The Impregnation Method is a widely used technique for preparing catalysts, especially metal-based catalysts. Here’s how it works:Support Material: A porous solid support, such as alumina (Al₂O₃), silica (SiO₂), or activated carbon, is chosen. This material provides a large surface area for the catalyst to be deposited on.Preparation of Catalyst Precursor: The metal or metal compound (usually in the form of a salt or complex) is dissolved in a suitable solvent to form a solution. Common catalysts include platinum, palladium, nickel, etc.Impregnation Process: The support material is soaked or immersed in the solution containing the metal precursor. The process can be done under normal atmospheric conditions or under vacuum, depending on the desired results.Drying and Evaporation: After the impregnation step, the support is removed and the