Cyclohexane ignition temperature

The process fluid. Cyclohexane (CgHi2, MW 84) is a colorless liquid similar in some of its properties to gasoline (flash point 20°C, auto-ignition temperature (AIT) 245°C). The fluid has a normal boiling point of 80°C and a saturation pressure, p i, at 150°C of 0.55 MPa. When the liquid was saturated with nitrogen, or air as when oxidation was occurring in the reactor stream, the pressure was 0.96 MPa. Under these conditions the liquid was 99.8% CsHi2 and 0.2% Nj or air the vapor would have consisted of 82.6% C Hij and 17.4% Nj... 

Levedahl (106) noted that aliphatics from acetylene to octane all gave hot flames at 600° C. He suggested that some reaction, such as thermal decomposition, which was common to all aliphatics, became important. Benzene showed a very high, inconsistent hot flame limit, while cyclohexane was low and variable. Levedahl believed the cool flame and subsequent reaction, along with compression, served to raise the mixture temperature to the critical value. Acetylene was believed to play a major role in the ignition reaction. 

A flammable chemical substance is a solid, liquid, vapor, or gas that ignites easily and burns rapidly in air. Many of the flammable chemicals used in laboratories are flammable liquids and organic solvents. The vapors of these chemical substances form ignitable mixtures with air. Based on the flash points of these chemicals, classifications are made. The flash point of a chemical substance is defined as the lowest temperature at which a fuel-air mixture present above the surface of a liquid will ignite, if an ignition source is present. The common flammable chemical substances include, but are not restricted to, acetone, benzene, cyclohexane, ethanol, ethyl acetate, ethyl ether, gasoline, hexane, isopropyl alcohol, methanol, propanol, tetrahydro-furan and toluene, and xylene. 

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