Experiment on thermal cracking coke of aviation kerosene

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.