Catalysed hydrogenation reaction

Videonummer 12081391
Catalysed hydrogenation reaction. Animation showing the hydrogenation of a double bond on a metal catalyst. Hydrogenation is a reaction in which a carbon-carbon double bond is broken and replaced by two hydrogen atoms. It is performed industrially on a large scale, usually to hydrogenate vegetable oils to more solid fats. In this animation, a molecule of oleic acid (C18.H34.O2), a monounsaturated fatty acid, is seen with a molecule of hydrogen gas (H2) above the metal surface. As the oleic acid binds to the metal, its single double bond is broken. The hydrogen molecule also binds to the metal surface, forming two hydrogen atoms. These hydrogen atoms attach to the bound carbon atoms, forming a linear saturated molecule of stearic acid (C18.H36.O2). In the food industry, nickel is often used as the catalyst for hydrogenation reactions. The final 30 seconds of the clip is a graph showing the effects of a catalyst on the energy state of the reaction as it moves between the reactants (left) and the products (right). The activation energy (Ea) is lower with the catalyst than without, increasing the reaction rate.
Lizenzart: Lizenzpflichtig
Credit: Science Photo Library / RHYS LEWIS, AHS, DECD, UNISA
Modell-Rechte: nicht erforderlich
Länge: 50 Sekunden
Seitenverhältnis: 16:9
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