Write a note on aromatization of alkane.

(N/A) $n$-Alkanes having six or more carbon atoms,on heating to $773 \ K$ at $10-20 \ \text{atm}$ pressure in the presence of oxides of vanadium $(V_2O_5)$,molybdenum $(Mo_2O_3)$,or chromium $(Cr_2O_3)$ supported over alumina $(Al_2O_3)$,undergo dehydrogenation and cyclization to form benzene and its homologues. This reaction is known as aromatization or reforming.
Example-$1$: $n$-Hexane $\xrightarrow[10-20 \ \text{atm}]{773 \ K, \ Cr_2O_3/V_2O_5/Mo_2O_3}$ Benzene
Example-$2$: $n$-Heptane $\xrightarrow[10-20 \ \text{atm}]{773 \ K, \ Cr_2O_3/V_2O_5/Mo_2O_3}$ Toluene