Question

how to convert hexane to methane

Answer 1

Hexane can be converted to methane by pyrolysis by heating it in the absence of air at 873 K. Along with methane other lower hydrocarbons like ethane, propane, butane, propene, ethene are also produced.
$C_6{H}_{14}\stackrel{∆}{\to }C{H}_4+C_2{H}_6+C_2{H}_4+C_3{H}_8+etc.,$