: 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 alsodestructive hydrogenation
Word History
Etymology
International Scientific Vocabulary hydrogen + -ation
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