[aoner]

Why dispose them? They’re a great carbon sink and as long as we don’t make short graphene chains I think they’re also not toxic for the environment. The process described uses methane (greenhouse gas) and if the process would be done with renewable energy it could even perhaps be carbon negative?

[TeMPOraL]

Good point. Could it be e.g. reused as a structural element, or some kind of filling (e.g. for roads)?

[aoner]

Yes, there are some papers that suggest that adding graphene-like elements to for example concrete will make them stronger. I think that if we can find a carbon neutral process of creating graphene it could be a great additive and a carbon sink (finally making a useful product out of carbon). It can even be used to detect damages in concrete (electrical resistivity value reduces at maximum compressive load). Here is an interesting paper: www.mdpi.com/2071-1050/9/7/1229/pdf but there are more applications once you start looking.