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Propane, butane, and liquefied gas are common hydrocarbon gas fuels, which have some differences in chemical structure, application fields, and usage characteristics. Below, we will introduce one by one

1、 Chemical structure: 

1 Propane C3H8 is a three carbon alkane composed of three carbon atoms and eight hydrogen atoms

2. Butane C4H10 is a four carbon alkane composed of four carbon atoms and ten hydrogen atoms

3. Liquefied petroleum gas, abbreviated as LPG, is a mixed gas mainly composed of propane and butane, and contains small amounts of gas components such as ethane and methane

2、 Application field: 

1 Propane is mainly used as a fuel gas and is widely used in household cooking, outdoor camping, and other occasions

2. Butane can also be used as a fuel gas, but it is mainly used in industrial fields, such as the production of polystyrene and solvent extraction

3. Liquefied gas is a commonly used civilian fuel gas, widely used in cooking, heating, and hot water supply in homes, hotels, restaurants, and other places

3、 Usage characteristics: 

1 Propane has a high combustion efficiency, can provide a high calorific value, and does not produce dust and residues after combustion, making it relatively clean

2. Butane has a high combustion temperature and good combustion effect, but it produces more gas pollutants and is less environmentally friendly

3. Liquefied gas has stable combustion and moderate combustion temperature, but for outdoor use, safety precautions should be taken to avoid accidents caused by gas leaks

In summary, propane and butane are both hydrocarbon gas fuels. Propane is mainly used in household cooking and outdoor camping, while butane is mainly used in industrial fields such as plastic production. Liquefied gas is a mixture of propane and butane, widely used for cooking and heating in homes, hotels, restaurants, and other places. In terms of usage characteristics, propane has high combustion efficiency and is relatively clean, butane has high combustion temperature but is not environmentally friendly, and liquefied gas has stable combustion and moderate temperature. Therefore, in different application scenarios, it is very important to choose the appropriate fuel gas, which not only meets the needs but also considers environmental and safety factors.