Any thoughts on CO2 + Lignin for the same applications?

"CO2 and Lignin-Based Sustainable Polymers with Closed-Loop Chemical Recycling" (2024) https://onlinelibrary.wiley.com/doi/10.1002/adfm.202403035

- https://news.ycombinator.com/item?id=40079540

(Edit)

"Making hydrogen from waste plastic could pay for itself" (2024) https://news.ycombinator.com/item?id=37886955 ; flash heating plastic yields Graphene and Hydrogen

"Synthesis of Clean Hydrogen Gas from Waste Plastic at Zero Net Cost" (2023) https://onlinelibrary.wiley.com/doi/10.1002/adma.202306763