Other characteristics of fuels Table

Beyond the chemical composition and the octane and cetane numbers of a given fuel, many other physico-chemical characteristics are measured distillation intervals for given fractions, density, volatility, viscosity, heat of vaporization, etc... Of special interest is the amount of energy released by the combustion of the fuel and due to the exothermiticity of the reaction. This quantity is often tabulated as the Net Heating Value or NHV, i.e. the heat of reaction of a liquid fuel and air giving gaseous combustion products (CO2 and H2O) at 25°C. 

Of course, some specifications of fuels are strongly regulated and their measurements normalized. This is also true for the specifications of emissions. 

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