Difference: Both of them are natural gas with the same composition, but their existing states are different. CNG is compressed natural gas, which is pressurized (over 3,600 pounds per square inch) and stored as gas in containers. LNG is liquefied natural gas. LNG is condensed into liquid by cooling gaseous natural gas to-162℃ under normal pressure. Liquefied natural gas can greatly save storage and transportation space and cost, and has the characteristics of large calorific value and high performance.

Extended data:

Liquefied natural gas is a clean and efficient energy source. Because importing LNG helps energy consuming countries to realize energy supply diversification and ensure energy security, while exporting LNG helps natural gas producing countries to effectively develop natural gas resources, increase foreign exchange income and promote national economic development, LNG trade is becoming a new hot spot in the global energy market.

CNG filling station includes main station, standard station and sub-station. Generally, the main refueling station takes gas from the high-pressure pipeline to refuel the CNG cylinder truck, and then transports it to the substation for gas supply through the CNG cylinder truck. At the same time, it has the ability to directly refuel CNG vehicles. The standard station generally takes gas from the urban medium-pressure pipe network to refuel CNG vehicles.

References:

LNG- Baidu Encyclopedia? CNG- Baidu encyclopedia