I meant LNG, but typed CNG because of a project I am working on now uses compressed NG. Brain fart.
The technology for LNG shipping exists. When I last played in the energy field we had some plans for it, but it was canceled when gas got cheap.
My favorite design was a tanker that had what looked like an arrangement of giant “eggs” on the deck for shipping. We were working on getting the LNG to them, not from the ships, so I didn’t get much of an insight into the ships themselves.
From there, I misspent some time in the ethanol market marking some of the best vodka on the market. Sadly, we didn’t have the marketing to capitalize on it.
Absolutely. These ships have been in service for decades. I recently learned about CNG ships using compartments of coiled "tubing".