A novel concept of supercritical diesel fuels for clean combustion has been presented. Development of supercritical diesel fuel combustion technology needs consistent property data of fuel over a wide range of temperatures and pressures. This work is focussed on five diesel fuel surrogates such as n-heptane, n-octane, n-nonane, n-decane and toluene which have been identified as the components of real diesel fuel. Correlations for thermophysical properties such as density, heat capacity, thermal conductivity and viscosity above critical point at a constant pressure and over a wide range of...