the soluve is ewan
There is no 'solvent' in pure natural gas. Pure natural gas is methane (colorless and odorless). The natural gas used in stoves has methylmercaptan mixed with the methane to give the gas an odor to help detect leaks. In this case the methane is the solvent and methylmecaptan is the solute.
Solute:carbon dioxide Solvent: Water Simple as that!