Dehydrocyclization of C 6 Hydrocarbon With and Without Oxygen Containing Substituent Over Pt/(Na)-Al 2 O 3 Catalyst

The presence of hydroxyl or keto functional group affects both activity and selectivity for dehydrocyclization of C 6 hydrocarbon over Pt/(Na)–Al 2 O 3 catalyst. Under similar reaction conditions, n-hexane produces benzene as the primary product (>40 %), whereas dehydration is a major reaction pathway for 2-hexanol and yields mainly hexenes (>70 %). However, 2-hexanone was found to be involved in a variety of reactions over Pt/(Na)–Al 2 O 3 catalyst and produces lower hydrocarbons (C 2 –C 5 ), 5-dodecanone, 2- and 5-nonanones, and 2-acetyl-3-propyl-2-cyclohexen-1-one. The presence of hydroxyl (–OH) or keto group (=C=O) at the C-2 position alters the interaction of C 6 hydrocarbon with the catalyst surface which eventually controls the overall product selectivity. Graphical Abstract