Liquefied petroleum gas is a mixture of propane and butane, usually accompanied by a small amount of propylene and butene. Usually, ethanethiol with strong smell is added, so that the leakage of liquefied petroleum gas can be easily found.
Liquefied petroleum gas (LPG) is produced when crude oil is refined, or gas emitted during the exploitation of oil or natural gas. Liquefied petroleum gas (LPG) is often mistaken for propane.
In fact, liquefied petroleum gas (LPG) is a mixture of petroleum and natural gas under appropriate pressure, which exists in liquid state at room temperature. In the United States and Canada, the mixture of these two substances is usually considered to be mainly composed of propane, while in many European countries, the propane content in liquefied petroleum gas is only 50% or less.
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Liquefied petroleum gas business:
Liquefied petroleum gas is a kind of petroleum products. It is a colorless and volatile gas produced in oil and gas fields, refineries and ethylene plants. Mainly used in automobile, city gas, nonferrous metal smelting and metal cutting.
In recent years, the global output of liquefied petroleum gas has increased rapidly. 20 1 1 year, the global output of liquefied petroleum gas reached about 250 million tons, an increase of 3.73%. It is estimated that the global output of liquefied petroleum gas will increase to 275 million tons in 20 14.
China is one of the countries with the fastest development of liquefied petroleum gas industry in the world. Its output increased from 1.399 million tons in 2004 to 2 1 10,000 tons in 2006, with a compound annual growth rate of 6.55%. 2012-1-April, the output of LPG in China was 7,332,400 tons.
The consumption of liquefied petroleum gas in China has also increased rapidly, from 2 1 13000 tons in 2004 to 24 1 19000 tons in 20 1 year, with a compound annual growth rate of 1.95%. 20121-in April, the consumption of liquefied petroleum gas in China was 7.55 million tons, up 5.30% year-on-year.
LPG is the most mature fuel used in China automobile alternative energy technology. It is predicted that in the future, most of the liquefied petroleum gas in urban civil gas in China will be replaced by natural gas, and the output of liquefied petroleum gas as a by-product of petroleum refining will increase with the increase of total petroleum refining.
At that time, there will be overcapacity in liquefied petroleum gas, and the price will naturally not go up like gasoline and diesel. When applied to automobiles, it will not only bring outstanding economic benefits, but also reduce greenhouse gas emissions. Therefore, the prospect of LPG as automobile fuel is optimistic.
The main source of commercial liquefied petroleum gas is the processing and refining of natural gas and petroleum, and the raw materials usually contain excessive propane and butane. In order to prevent these two substances from condensing in the high-pressure exhaust pipe, they must be removed.
In the process of petroleum refining. Liquefied petroleum gas is collected from the mixture with light specific gravity dissolved in crude oil by titration. It can also be produced by molecular fission of heavier hydrocarbons. Therefore, liquefied petroleum gas is regarded as an accessory product. Its exact composition and characteristics usually vary from source to source.
The unit weight of LPG is 8% higher than that of gasoline. (LHV =19,757 btu/LBM) Theoretically, vehicles equipped with LPG are more efficient than those driven by gasoline. This kind of car can reduce fuel consumption and improve mileage at the same time. However, this only applies to engines specially designed and modified for liquefied petroleum gas.
If the gasoline engine is changed to LPG-driven type, this improved efficiency will not be obtained. Because the density of liquefied petroleum gas is much lower than that of gasoline, the relative demand for oxygen is higher, and this lower density fuel will replace the incoming air. Therefore, less air enters the cylinder, thus reducing the efficiency per unit volume. Compared with the power generated by the original gasoline engine. The power will be reduced.
References:
Baidu encyclopedia-liquefied petroleum gas