https://www.frontiersin.org/articles/10.3389/fenrg.2019.0002...)
https://cen.acs.org/environment/recycling/Amid-controversy-i...
https://www.sciencedirect.com/science/article/abs/pii/S01652...
The second link is a news article that is very critical about the motivations, projected success, and sneaky language used by companies to justify pyrolisys. And this is coming from what is ostensibly a pro-chemical news source.
The third article is paywalled and I'm guessing 99% of us can't read it. However, the `Opportunities and Challenges` is again academic talk for "we looked into it and it's really really hard".
I found this link while searching the DOI of the third article. Sci-Hub seems to be a site that lets you access all sorts of scientific papers, because they believe everyone rich or poor should have free access to science. It was created by Alexandra Elbakyan, a modern day Robin Hood.
Or so they say, I'd never endorse you reading the paper without giving more money to the multi-billion dollar private publisher Elsevier.