1. Hydrogenation : The process of adding hydrogen to fats or oils.2. This catalyst is used in the hydroformylation or hydrogenation of alkenes. 3. Important examples include hydrogenation , hydroformylation, hydrosilylation, hydrodesulfurization catalysts. 4. The overall mechanism resembles that for homogeneous hydrogenation with additional steps. 5. Hydrogenation may be used to reduce the unsaturation in linolenic acid.6. The oxazolidinone auxiliary is also conveniently cleaved under the hydrogenation conditions. 7. It is produced by hydrogenation of 1, 4-dichloronitrobenzene. 8. Many higher alcohols are produced by hydroformylation of alkenes followed by hydrogenation . 9. Iridium complexes are being investigated as catalysts for asymmetric hydrogenation . 10. Nickel and its alloys are frequently used as catalysts for hydrogenation reactions.