Seek advice on preparing catalysts via coprecipitation method
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Now, experiments need to be conducted to prepare a catalyst with cobalt and molybdenum as active components, using r-Al2O3 as the carrier. If the co-precipitation method is used, should the carrier r-Al2O3 be simply ground up and added to the solution so that the active components precipitate on its surface, or should some aluminum salt be used to enable the aluminum in the carrier to precipitate together with the other two active components?
If r-Al2O3 is directly ground and added to a solution, allowing the active components to precipitate on its surface, this is a typical method of preparing catalysts through impregnation； If prepared by coprecipitation, it is necessary to adjust the pH of the system to prevent the separate precipitation of various components. Therefore, the concentrations of metal salts, precipitants, as well as the pH of the medium and other conditions must all be such that all components precipitate together, allowing the active metals to deposit fully on the surface of the carrier. At the same time, the carrier can also be adjusted, such as by replacing it with SiO2, Ti salts, etc.