Abstract：The high-speed flight of aircraft poses severe thermal management problems. The catalytic reforming reaction of hydrocarbon fuels is a strong exothermic reaction that can provide higher chemical heat sinks than other chemical reactions, theoretically solving the thermal management problem of hypersonic scramjet engines. In this work, Rh/γ-Al2O3 catalysts with small particle size and highly dispersed rhodium were prepared and their structure-activity relationships were characterized. The catalytic activity and stability of the prepared Rh/γ-Al2O3 under different Rh loadings contents, airflow rates, and reducing atmospheres were investigated using a fixed bed reactor. In addition, the catalytic reforming effect and influence on thermal cracking were evaluated using a fixed packed-bed electric heater reactor under supercritical conditions. The influence of water content, catalyst amount, and flow rate on the thermal sink of n-decane catalytic reforming under supercritical conditions was studied in detail. The results showed that the thermal sink of the catalytic reaction at 675 ℃ can reach 4.25 MJ/kg under a water content of 20 % (mass fraction), which was 0.75 MJ/kg higher than the thermal sink provided by thermal cracking at the same temperature.
GUO Qi,ZHANG Rongrong,LU Zhengxing et al. Study on the Effect of Heat Sink Characteristics of Catalytic Reforming Reaction of Supercritical Hydrocarbon Fuels[J]. Chemical Reaction Engineering and Technology, 2025, 41(1): 230-237.
