To reduce the coke deposition of aviation kerosene in the process of active thermal protection

some reaction principles of thermal cracking and coke deposition should be investigated. Thermal cracking and coke experiments were conducted to compare the difference of gaseous

liquid and coke amount under different conditions. The results showed that dimerization of olefins and condensation polymerization of aromatics were the main reactions in the coke process. With the enhancement of temperature

the reaction rates of dimerization and polymerization sped up

so the coke amount in the reactor was aggravated. Volumn fraction of gas products such as methane and ethylene increased. In the liquid products

mass fraction of alkane decreased but the aromatics mass fraction increased. The residence time of kerosene increased significantly with the growth of pressure

benefiting the coke formation and additional aromatics in the liquid products.