Liquefied petroleum gas and liquefied petroleum gas have the following differences:
Liquefied natural gas (LNG) is natural gas mined in the mine. After being purified, it is compressed and warmed up, cooled and removed by mixing refrigerant, and nitrogen, carbon dioxide, solid impurities, sulphides and water are removed The flow expands to give a liquid form with a volume reduced to 1/600 at -162 ° C, the main ingredient being methane.
Liquefied petroleum gas (LPG) is a colorless, volatile gas obtained by pressurizing, cooling and liquefying refinery gas or natural gas (including gas associated with oilfields). Liquefied petroleum gas obtained from the refinery gas, the main components of propane, propylene, butane, butane, while containing a small amount of pentane, pentene and trace sulfur compounds impurities.
(2) Environmental protection
LNG liquefaction process, sulfur, carbon dioxide, water and other impurities have been removed, so after the combustion emissions of pollutants than LPG, diesel, heavy oil and other less than 50%, LNG has become the world's most pure new energy sources, The most environmentally friendly, pollution-free choice.
LPG heat value is 22033 ~ 29043kcal / Nm3, LNG calorific value is 8500 ~ 9000 kcal / Nm3, the same heat value, LPG is equivalent to 2.6 natural gas, but the price of LPG about 20 yuan / cubic meter, LNG about 4.5 Yuan / cubic meter. This shows that natural gas is more affordable than liquefied petroleum gas for the same heat value. With the soaring prices of energy sources such as oil and coal, the prices of liquefied petroleum gas (LPG) will also continue to rise. As the cost of LNG mining is low, the national prices are relatively stable.
LNG compared with LPG, the gas density of 0.74, lighter than air, a slight leak, you can drift with the air, the ignition point of 650 ℃, higher than the LPG 460 ℃, the explosion limit of 5% -15%, than the LPG 1% -15% to be narrow, LPG gasification density greater than air, not volatile, easy to allow suffocation, combustion, explosion.