How does the storage method of CNG differ from that of liquid fuels?

The storage method of compressed natural gas (CNG) is primarily characterized by the requirement for high-pressure storage tanks, which distinguishes it from liquid fuels. CNG is stored at pressures ranging from 2,000 to 3,600 psi to efficiently compress the gas to a volume that makes it practical for storage and transportation. This high-pressure storage is necessary due to the low density of natural gas in its gaseous state.

In contrast, liquid fuels, such as gasoline or diesel, are stored at ambient pressure in specially designed tanks and do not require the same high-pressure infrastructure. They are stored in a liquid state, making it possible to use gravity or lower pressure systems without the need for the complexities of high-pressure containment that come with gaseous fuels.

This critical difference in storage requirements highlights the importance of appropriate tank design and safety protocols when dealing with CNG compared to liquid fuels. The need for high-pressure tanks emphasizes the specialized nature of CNG storage, focusing on the chemistry and physical properties of gases versus liquids.