How is propane converted to ethene?

[crayolé]

I got this question in a practice test and looking through the textbook/tsfx i couldnt find out it was done.

The furthest I got was that the propane loses a methyl group (-CH₃) and the spare bond from that disconnection forms a double bond which makes ethene.

Is that how it works? What catalysts/conditions are needed?

[happyhappyland]

It isnt in the study design, but what happens is propane is heated at a a high temperature therefore it becomes "cracked" the process is called cracking. Propane then forms double bonds and splits off forming ethene.

[Edmund]

Yeah, the process is catalytic cracking and I'm pretty sure it isn't on the course anymore