Define aeromatisation reaction.

1.	Define aeromatisation reaction.
Answer» Aromatization is the conversion of a nonaromatic hydrocarbon to an aromatic hydrocarbon.There are four common methods of aromatization.1. Dehydrogenation of naphthenesNaphthenes are a class of cyclic aliphatic hydrocarbons obtained from petroleum. They have the general formula <mathjax>CnH2n</mathjax>. The simplest naphthene is cyclohexane, C₆H₁₂. Catalytic dehydrogenation converts it to benzene.C₆H₁₂ → C₆H₆ + 3H₂2. Dehydroisomerization of naphthenesMethylcyclopentane, C₆H₁₂, is catalytically isomerized and dehydrogenated to form benzene.C₅H₉CH₃ → C₆H₆ + 3H₂3. Dehydrocyclization of aliphatic hydrocarbonsHeptane is catalytically converted to toluene.C₇H₁₆ → C₆H₅CH₃ + 4H₂Small amounts of platinum on acidified alumina accomplish reactions (1), (2), and (3) readily.4. Condensation of hydrocarbonsPropane is catalytically converted to benzene during the cracking of petroleum at 600-800 °C.3C₃H₈ → C₆H₆ + 3CH₄ + 3H₂

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