Many different types of double bond can react with hydrogen gas in the presence of a catalyst.
Catalysts used are Ni Pd Pt Ru Rh Co
Hydrogenation reactions occur in the stages shown here for the hydrogenation of ethene on nickel.
If the product bonded strongly to the catalyst
what would happen?
The catalyst surface would become covered in adsorbed
product and the reaction would slow down and stop.
The catalyst and the support employed depend
on the particular hydrogenation reaction being carried out. You
are probably making daily use of products of hydrogenation reactions.
For example it is a hydrogenation reaction which transforms vegetable
oils into margarine,
There are several stages involved
in taking a process like hydrogenation from the laboratory, where
feasible reactions are identified, to full scale production. For
more details on how this is achieved,