Cracking, Catalytic
Catalytic cracking involves breaking longer chain linear alkanes into shorter branched alkanes, cycloalkanes ("naphthene") and a mixture of aromatics.

The process is usually optimised to produce gasoline.

Shape selective zeolite catalysts are used.

At the 450-550°C cracking temperatures long linear alkanes are thermodynamically unstable with respect to shorter and branced alkanes (and even C + H2, coke deposits on the catalyst).