Classes of Heterogeneous Catalysts
Although the majority of heterogeneous catalysts are solids, many variations exist.
| Reacting phases | Examples | Comment |
|---|---|---|
| solid + gas | Ammonia synthesis from N2 + H2 over iron catalysts | |
| solid + solution | hydrogenation of fatty acids with nickel | used for the production of margarine |
| immiscible liquid phases | hydroformylation of propene | catalyst in aqueous phase, reactants and products mainly in nonaqueous phase |
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