Physical property
There are many components in natural gas, but the components do not play a chemical role with each other. The nature and content of each component determine the nature of natural gas. Since the content of methane in natural gas is more than 90%, natural gas is also called methane gas.
Natural gas is colorless and tasteless. However, before it is sent to the end user, mercaptan is used to add odor to the natural gas to facilitate leakage detection. Natural gas is not as toxic as carbon monoxide. It is essentially harmless to human body. If the natural gas is in a high concentration state and the oxygen in the air is insufficient to maintain life, it will still cause death. After all, natural gas cannot be used for human respiration.
Chemical property
Methane is a colorless and odorless gas. It has a slightly luminous blue flame when burning. It is lighter than air and can become liquid under low temperature and high pressure. The critical temperature is - 82.11 ° C and the critical pressure is 4.64mpa. After liquefaction, the volume will be reduced to 1 / 600, and 9.52 nm air is required to burn off 1nm methane.
The explosion limit of methane in air is: lower limit 5%; Upper limit: 15%
Natural gas consists of methane, ethane, propane, isobutane, etc., and a small amount of heavy hydrocarbons, nitrogen, helium, sulfur dioxide, etc.
