LPG (liquefied petroleum gas) refers to the liquefied mixture of petroleum and natural gas, which is composed of hydrocarbons such as propane (C3H8) and butane (C4H 10). Compared with LNG (liquefied natural gas), LPG is mainly used for heating, cooking and fuel in domestic, commercial and industrial fields.
Liquefied petroleum gas is realized by pressurizing and cooling natural gas to change it from gaseous state to liquid state. It has the characteristics of high energy density and easy storage and transportation. Liquefied petroleum gas is stored in steel or composite pressure vessels to meet different usage scenarios and requirements.
Liquefied petroleum gas can usually be obtained by separating auxiliary gas and natural gas produced in petroleum refining process and extracting methane gas. As a clean fuel, liquefied petroleum gas has relatively less sulfur content and harmful particles, and the tail gas produced during combustion is more environmentally friendly.
Liquefied petroleum gas is widely used in domestic cooking, heating, hot water supply, cooking equipment in commercial places such as hotels and restaurants, automobile fuel and other fields. It is considered as a flexible and multifunctional energy source, which is widely used, economical and efficient.
Development course of liquefied gas;
At the beginning of the 20th century, the rise of petroleum industry made liquefied petroleum gas widely used as a combustible energy source. Initially, liquefied petroleum gas was supplied as gas, but there were difficulties in transportation and storage.
From1920s to191930s, liquefied gas technology gradually matured. By pressurizing and cooling natural gas, it is compressed into a liquid state and stored in a steel container, thus realizing the liquefaction and portability of natural gas.
In the late 1960s, liquefied petroleum gas began to be widely used in industry and rural areas, such as fuel, lighting and cooking. At the same time, liquefied gas as automobile fuel is gradually popularized.
From 1950s to 1960s, the liquefied gas industry experienced rapid development. The supply and use of liquefied petroleum gas are gradually standardized, and the construction of liquefied petroleum gas distribution network and safety measures are gradually improved.
From 1970s to 1990s, with the growth of energy demand and the progress of technology, the production and use of liquefied gas have been expanding. Different countries have established liquefied gas supply networks and formulated relevant policies and standards to ensure safety and environmental protection.
Since the 20th century, liquefied gas has continued to maintain its important position in the energy field. With the enhancement of environmental awareness and the development of renewable energy, the advantages of liquefied petroleum gas as a clean fuel are increasingly prominent. At the same time, technological innovation has also promoted the further development of liquefied gas industry, such as the popularization and application of liquefied natural gas (LNG).