ˌhīdrə̇jə̇ˈnāshən, hīˌdräjə̇ˈ- noun
( -s )
Etymology: International Scientific Vocabulary hydrogen + -ation
: the process of hydrogenating: as
a. : the addition of hydrogen to the molecule of an unsaturated organic compound usually in the presence of a catalyst (as nickel) and often at elevated temperature and pressure
hydrogenation of benzene to cyclohexane
b. : a decomposition (as of hydrocarbons) at high temperature and pressure with addition of hydrogen to the molecules formed : hydrogenolysis
hydrogenation of coal to gasoline and oils
— called also destructive hydrogenation