One method for doing that is catalytic cracking: https://en.wikipedia.org/wiki/Fluid_catalytic_cracking https://en.wikipedia.org/wiki/Fluid_catalytic_cracking

One method for doing that is catalytic cracking: https://en.wikipedia.org/wiki/Fluid_catalytic_cracking https://en.wikipedia.org/wiki/Fluid_catalytic_cracking https://www.britannica.com/technology/petroleum-refining/Visbreaking-thermal-cracking-and-coking https://www.britannica.com/technology/petroleum-refining/Vis...