LNG is basically “Liquified Natural Gas”.
CNG is “Compressed Natural Gas”
Both are having the same molecule Methane CH4.
But LNG being a liquid can be transported by ships and tankers …that is how we import LNG and then convert this in to Compressed Natural Gas for our auto fuel / domestic kitchen.
Apart from Auto fuel and domestic fuel , CNG Methane CH4 is also used as an important Gas for Production of Hydrogen in Fertlizer plant and oil refineries…i
In fertliser plants, Hydrogen is a feed stock for Ammonia and DAP production.Oil refineries use hydrogen for a lot of petroleum products including reformulated fuel.
However, in this process, it involves carbon emission…Methane CH4 contains carbon.
Hence Green hydrogen is the theme in which Hydrogen is to be produced from water by electrolysis and if the electricity is produced from solar /wind to power the electrolysis process , we call it a Green hydrogen as there is no carbon emissions in the entire process.
You may please read the thread from the begining to get more insights