RE: It might dip - that's good23 Dec 2020 11:00
Dr.Anomaly. It's funny how people start insults so quickly. Its not guesswork! It's physics/ chemistry. I wonder why I bother to try to help. Also the figures of Hydrogen are right off PHE brochure! They say out of 35T/day of plastics they get 2T/day of Hydrogen. WHich is about 6%. WHich is probably realistic.
Just look at the chemistry. Let's pick some popular "plastics": Polyethylene (PE) is C2H4. PVC is C2H3Cl. And PET is C10H8O4. A MW of 28, 62 and 192! With such tiny amounts of Hydrogen. So at best PE, the amount of Hydrogen in PE is 4/28th! THERE IS VERY LITTLE HYDROGEN IN PLASTIC.
I am an engineer and have lots of experience with reforming methane and this is a very energy intensive and expensive way and the only "waste" being carbon, which requires sequestration, and a load of other chemicals that is mixed in the feed.
To my mind the way to deal with waste plastic is to keep the Carbon locked in the polymer and re-purposed into something else. After all the plastic molecule is very stable and takes hundreds of years to break down, which is why plastic waste is such a problem to the environment.
I would be pleased to accept an apology Dr Anomaly or please feel free to correct me. Please note how I have not resorted to insults but just facts and chemistry.