Question

Which principle is used for storing CNG in petrol pumps

Answer 1

CNG (Compressed Natural Gas) is a highly volatile, gaseous mixture of several hydrocarbons. It is considered to be one of the most dangerous substances to transport, since even a small disturbance can set off a huge explosion.

The easiest way to store CNG is in liquid form, since it is more stable. To achieve this liquid state, the principle of 'Critical temperature and pressure' is applied. According to this principle, above a certain pressure and below a certain temperature, the CNG can be liquefied to become stable.