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Examples
Heterogeneous catalysts usually catalyze reactions less selectively than homogeneous ones.
- Tab. 1
- Implementation of water gas (H.2/ CO mixture) at different contacts
| catalyst | product |
|---|---|
| pure ZnO | Methanol |
| ZnO with a lot of Cr2O3 | C.1... C4-Alcohols |
| ZnO with little alkali oxide | C.1... C4-Alcohols |
| ZnO and Fe2O3 | Methane and higher hydrocarbons |
| Fe, Ni, Co (10 ... 20 bar) | Petrol |
| Ni | acetic acid |
Characteristic classes of substances are used as catalysts for certain types of reactions:
- Tab. 2
- Catalysts for some types of reactions
| reaction | Catalysts |
|---|---|
| Oxidations | V, V2O5, Cu, Ag, Fe2O3, MnO2, Ag2O, CuO |
| Hydrogenations / dehydrogenations | Pt, Pd, Fe, Co, Ni, Cu, oxides of Zn, Cr, Mo, W |
| Hydrations / dehydrations | Al2O3, SiO2, TiO2, BeO, aluminosilicates, phosphates |
| Isomerizations | Cu, Ni, hydroxides of Al, Mo, Mg, Ca, Ba |
| Halogenations | Halides of Fe, Cu, Al, P |
