how is polyethylene broken down into diesel through pyrolysis if polyethylene is (C2H4)n and diesel is C12H24?

Question

i want the exact chemical reaction 

Answer 1

You won't get the EXACT chemical reaction because there isn't ONE.  There are many reactions that take place.  The polymer (C2H4)n is heated at high temperature, and the macromolecules are broken into smaller molecules, resulting in the formation of a wide range of hydrocarbons. The products obtained from the pyrolysis can be divided into a non-condensable gas fraction, a liquid fraction (consisting of paraffins, olefins, naphthenes and aromatics) and solid waste. From the liquid fraction  you can be recover hydrocarbons in the gasoline range (C4-C12), diesel (C12-C23), kerosene (C10-C18) and motor oil (C23-C40).