What are the byproducts of gasoline combustion?
2 Answers
The byproducts of gasoline combustion are mainly water and carbon dioxide, along with CO, nitrogen oxides, sulfur oxides, etc. Here is a related introduction to the main characteristics of gasoline: Stability: Refers to the stability of gasoline when stored under natural conditions for a long time, characterized by gum content, induction period, and iodine value. The lower the gum content, the better; the longer the induction period, the better. National standards stipulate that the actual gum content per 100 milliliters of gasoline must not exceed 5 milligrams. The iodine value indicates the content of olefins. Corrosiveness: Corrosiveness refers to the property of gasoline to corrode equipment such as storage tanks, pipelines, valves, carburetors, and cylinders during storage, transportation, and use. It is characterized by total sulfur, mercaptans, copper strip test, and acid value.
When gasoline burns in the engine, it mainly produces carbon dioxide and water vapor, which are relatively clean byproducts. However, real-world conditions are less ideal because the combustion process also releases carbon monoxide, a highly dangerous substance that can easily cause poisoning. Additionally, at high temperatures, nitrogen gets involved and forms nitrogen oxides, which are major contributors to smog. The last time I opened up an engine, I also found carbon deposits—those black residues are evidence of incomplete combustion. The sulfur in gasoline turns into sulfur dioxide when burned, which smells like rotten eggs and can corrode the exhaust pipes. So, while cars are convenient to drive, their emissions are quite complex, which is why there's such a push for electric vehicles nowadays.
