If I’m not mistaken, there is a refying process which can produce a liquid gas which does not require that it be stored under pressure, voila, how will the greenies stop this if gas is 8-10 a gal.
Tangent to that is the advent of Liquid Gas Direct Injection
2 firms, one AU, one in the Netherlands making the Injector, one in Germany that already is doing the entire conversions to VW autos with Direct Injection. Note the system is still under pressure and requires Gaseous types of tankage.
By going from a liquid to a gas via the injector they do not have to have all the other hardware to do the conversion before the Injector.
They are also taking advantage of the change of state and the cooling will allow greater turbocharging or compression ratios. Smaller engines, more zip, lower emissions with a slight drop in fuel economy when it used to be bigger with gaseous fuels.
In some regards the Eco-Weenies and the EPA have cooked their own goose here. For years they have pushed the big 3 and others to get more efficient, ok they adopted Direct Injection, Now they can supplant the Gasoline One for a Liquid Gas - Direct Injector. Game Changer, and IMHO they ain't going to be able to stop it if this builds up steam.