“It is energetically difficult and expensive to “Oligomerize” (fuse) small chains into big ones. You cannot efficiently run an industrial economy on shale oil alone because you can’t make enough Diesel/Jet fuel without massive waste. It is thermodynamically efficient to “Crack” (break) a long chain into specific smaller pieces. This is why US Coking Refineries are the “Golden Key.” They take the cheapest feedstock (C50+ sludge) and turn it into the most valuable product (C16 Diesel).” – John Doe
Entropy
Related: