Hot carbon dioxide gas can act very much like a solvent, and for an otherwise unlikely solute at that -- elemental carbon. See [here](https://chemistry.stackexchange.com/a/131484/17175) for the not so exotic chemistry involved.

The concept of carbon "solubility" in a hot carbon-dioxide bearing gas is useful in optimizing temperature and gas composition for cleaning carbonaceous contaminants off a steel strip during some continuous annealing/hot dip coating processes.