Cracking actually doesn't need tall towers. If you see something tall on a chemical plant, then you're likely looking at fractionating columns, not the cracking

Cracking actually doesn't need tall towers. If you see something tall on a chemical plant, then you're likely looking at fractionating columns, not the cracking reactors. I happened to do a project on their fluid dynamics at university :) They don't have to be this tall, if you need lower throughput or if your products don't have wildly different boiling points.