Liquefied hydrocarbon science knowledge


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Liquefied hydrocarbon science knowledge


1, noun explanation

At 15 ° C, hydrocarbon liquids with a vapor pressure greater than 0.1 MPa and other similar liquids do not include liquefied natural gas.

2. English translation

Liquefied hydrocarbon

3. Detailed explanation

Hydrocarbons which become liquid by means of pressurization or temperature reduction, such as ethane, ethylene, propylene, petroleum gas, etc., or hydrocarbons which are pressurized or cooled to become liquids are liquefied hydrocarbons.
Liquefied hydrocarbons are classified as Class A and Class A fire hazardous media and have obvious fire and explosion hazards. The components of the liquefied hydrocarbon generally include; ethylene, ethane, propylene, propane, butene, butane, and other hydrocarbons, as well as minor amounts of sulfur compounds, which are multicomponent mixtures. It can be stored in two ways: lowering the temperature under normal pressure or increasing the pressure at normal temperature. The storage temperature is between -196 and 50 °C. This kind of gas mixture at normal temperature has a very low boiling point, and the self-ignition point generally ranges from 250 to 480 °C. It is easy to form an explosive gas mixture in the air at normal temperature and normal pressure. The explosive gas mixture of such liquefied hydrocarbons is generally heavier than air (except methane and ethylene) and tends to accumulate at low temperatures after leakage.

The ignition energy of liquefied hydrocarbons is very low, generally around 0.25 mJ (0.25 mJ for ethane, 0.26 mJ for propane and 0.25 mJ for butane). The ignition energy of ethylene explosive gas mixture is only 0.0096 mJ, which is easy to be ignited. explosion. The liquefied hydrocarbon stored under pressure can be vaporized or depressurized, and the volume can be increased by 250 to 300 times in an instant, causing an overpressure explosion.

Liquefied hydrocarbons can be used as a basic raw material for petrochemicals, such as cracking to produce ethylene, propylene, butene, and can also be used as a fuel.



(Source: Qingdao Safety Supervision)

[Editor: Chen Guofang]


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