From plastic waste to green hydrogen, profitably

In recent past, plastics have been only considered as a waste, which one should diminish as much as possible. Most of the everyday plastic is polyethylene, and exciting new avenue for its recycling has recently been reported. Wyss et al. (https://doi.org/10.1002/adma.202306763) have written in Advanced Materials how one can produce hydrogen and graphene by rapid heating of polyethylene without any carbon dioxide emissions. By selling graphene, which is needed in increasing amounts, the production of a major energy source for future, hydrogen, becomes highly profitable.

So, a vision for a hydrogen production emerges which simultaneously nearly abolishes plastic problem. First, consumers are paid a small sum of money per kg of polyethylene returned to recycling stations. This is done, because while environmentally concerned people recycle plastics anyway, many people who are now throwing plastic bags to the environment would probably keep them if they knew that some money is given when the plastic is taken to recycling station. Second, the collected plastic is taken to hydrogen production facility. Hydrogen and graphene are produced, and hydrogen becomes, in fact, an energy source with no cost, as the produced graphene can be sold to any interested party at a price that is below today’s market price.

At the moment, the method for the production of hydrogen and graphene from waste plastics is at the lab scale, so scaling it up to commercial scale needs some time. However, in about five years the vision may become reality. It amounts to combatting climate change and plastic problem simultaneously, and doing it profitably. This shows again, how innovative new solutions can make green shift profitable, opposite to what the conservative, oil-loving populists say.