Liquifying or turning it into syngas seems counter intuitive as we’re releasing a long chain carbon store back into atmospheric co2
There's no benefit to storing carbon if you immediately turn round and extract fossil fuels to replace the carbon you just buried.
Even when we start making plastic at large scales from captured carbon, it's still not a good idea to bury that if you then need to go and make more of it.
Landfills are just generally not the best option and you'll probably find support for them traces back directly to fossil fuel interests since they very neatly line up with their incentive structure compared with the alternatives.
I think that's exactly wrong, if it's really made from captured carbon. At that point, it would make sense to make plastic with the sole intent of burying it.
And it's not just plastics. Imagine all of the newsprint that was put into landfills before the Internet and recycling came along. That's quite a few tons of carbon!
We should mandate an international standard size container for food and beverages, so that eg. glass bottles can be reused by multiple brands, just with a different paper logo glued on.