Natural gas is one of the safer fuels, which can be used for power generation; It can be used as chemical raw materials; It can also be widely used in civil and commercial gas stoves, water heaters, heating and refrigeration, as well as in paper making, metallurgy, quarrying, ceramics, glass and other industries, as well as waste incineration, drying and dehydration. The following is the role of natural gas: 1. Natural gas can be used for gas powered generation. The waste emission of gas turbine power plants fueled by natural gas is much lower than that of coal-fired and oil-fired power plants, and the power generation efficiency is high, the construction cost is low, and the construction speed is fast. 2. Natural gas can be used as chemical raw materials. The chemical production unit with natural gas as raw material has the advantages of low investment, low energy consumption, less land occupation, less personnel, good environmental protection and low operation cost. 3. Natural gas is widely used in civil and commercial gas stoves, water heaters, heating and refrigeration, as well as paper making, metallurgy, quarrying, ceramics, glass and other industries, as well as incineration, drying and dehydration. 4. The emissions of carbon monoxide, nitrogen oxides and hydrocarbons of natural gas vehicles are much lower than those of gasoline and diesel vehicles. They do not accumulate carbon, wear and tear, and have very low operating costs. They are environmentally friendly vehicles. Natural gas is an important energy source and a high-quality fuel. The main component of natural gas is methane, which can be used as fuel or raw materials for manufacturing carbon black, synthetic ammonia, methanol, acetylene, etc; Natural gas is a valuable chemical raw material. Compared with natural gas, LNG has the following advantages: ① Convenient for storage and transportation; The density of liquefied natural gas is 625 times that of methane in standard state. In other words, 1m3 LNG can be gasified into 625m3 natural gas, which shows the convenience of storage and transportation. ② Good safety; The main mode of natural gas storage and transportation is compression (CNG). Due to the high pressure of compressed natural gas, it brings many potential safety hazards. ③ Less indirect investment; The volume energy density of compressed natural gas (CNG) is about 26% of that of gasoline, while the volume energy density of liquefied natural gas (LNG) is about 72% of that of gasoline, which is more than twice that of compressed natural gas (CNG). Therefore, the distance of vehicles using LNG is long, which can greatly reduce the number of vehicle filling stations. ④ Peak shaving effect; As a fuel for civil gas or power plants, natural gas will inevitably have demand fluctuations, which requires peak shaving in supply. ⑤ Environmental protection; Natural gas must be strictly pre purified before liquefaction, so the impurity content in LNG is far lower than that of CNG, which creates conditions for the emission of automobile exhaust or used as fuel to meet more stringent standards (such as "Euro II" or even "Euro III").