An example of homogeneous catalysis is:
Haber's process: It combines nitrogen from the air with hydrogen derived mainly from natural gas (methane) into ammonia using Iron oxide catalyst at higher temperature and pressure.
Contact process: It involves the following steps:
1. makes sulfur dioxide by burning sulfur in excess of air/oxygen.
2. converts the sulfur dioxide into sulfur trioxide in the presence of a catalyst vanadium pentoxide
In lead chamber process, Sulfur dioxide is oxidised to Sulfur trioxide by the oxides of nitrogen. Hence it is homogeneous catalysis as the catalyst as well as the reactants are in gaseous.
Catalytic hydrogenation is the addition of hydrogen to an unsaturated compound with a double or triple bond such as oil. The process of catalytic hydrogenation utilizes a metal catalyst such as nickel, palladium, or platinum.