Itsetulemislämpötila

Itsetulemislämpötila, also known as autoignition temperature or spontaneous ignition temperature, is the lowest temperature at which a substance will spontaneously ignite in a normal atmosphere without an external source of ignition, such as a flame or spark. This phenomenon is a critical factor in fire safety and chemical process design. It is important to distinguish it from the flash point, which is the lowest temperature at which a liquid gives off enough vapor to ignite in the presence of an ignition source. The autoignition temperature is a characteristic property of each substance and depends on factors such as pressure, the presence of catalysts, and the duration of exposure to heat. For example, diesel fuel has a lower autoignition temperature than gasoline, which is why diesel engines can operate without spark plugs. Understanding itsetulemislämpötila is crucial for preventing fires, especially in industrial settings where flammable materials are handled. Materials stored or processed at temperatures near or above their itsetulemislämpötila pose a significant risk of combustion. Safety data sheets (SDS) for chemicals typically provide this information, allowing for appropriate safety measures to be implemented.