aim to hydrodesulfurizion from heavy naphtha
i need complete procedure of this method
Wetness impregnation method is a very basic method for catalyst preparation.
It also has some changes according to the actual situation, such as adding surfactants, co-solvents, etc.
For example, in paper of Article Selective aromatization of biomass derived diisobutylene to ...
2.1. Catalyst preparation
The M/Al2O3 Catalysts were prepared by impregnation method using pelletized γ-alumina balls (diameter 1.5–1.7 mm) as support. After calcined at 600 °C for 4 h, the γ-alumina balls were respectively impregnated with salts solution (Cr(NO3)3, Fe(NO3)3, Co(NO3)2, Ni(NO3)2, Zn(NO3)2, NH4VO3, (NH4)2Mo2O7, analytical grade pure) under continuous stirring for 10 h, and then again dried and calcined at 600 °C for 4 h. The metal loading amount was 5% (mass fraction) in the M/Al2O3catalysts. The Cr–Al–O catalysts were prepared in the same way with the loading amount from 1% to 20% (calculated based on Cr mass fraction). For example, to prepare 5% Cr/Al2O3 catalyst, 40 g Al2O3 was added to a solution prepared with 16.2 g Cr(NO3)3·9H2O and DI-water. The Cr–AE–Al–O catalysts (denoted as CrAE) were prepared by stepwise impregnation method. The alumina balls were first treated with solution of alkali earth salts (Mg(NO3)2, Ca(NO3)2, Ba(NO3)2, analytical grade pure), dried and calcined at 600 °C. And then, 5% Cr was loaded in the same way as that of M/Al2O3 preparation. The Cr–Mg–Al–O catalysts were prepared in a similar procedure with the Mg loading amount (calculated based on MgO mass fraction) from 0.75% to 3%. The catalyst with x% Mg loading was denoted as CrMgx.
As for your example，to load three metals, Ni, Mo and W, you can take a single step or a stepwise impregnation method by repeating the above steps. The two methods should have different effects. You can try it.
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