Ultra-high oxygen removal efficiency films for autoxidation inhibition of endothermic hydrocarbon fuels

Endothermic hydrocarbon fuel has attracted tremendous attention in the field of hypersonic vehicles. However, endothermic hydrocarbon fuel undergoes autoxidation reactions in the range of 433 K-723 K due to the action of dissolved oxygen to produce oxidation deposition, which leads to a decrease in heat transfer efficiency and even clogging of tube. Herein, in order to solve the oxidative deposition of endothermic hydrocarbon fuel RP-3, the catalytic carbon film with catalytic dissolved oxygen removal performance was prepared by combining the high catalytic property of Schiff base copper catalyst and the strong reducing property of phenylhydrazine. The catalytic carbon film was characterized by SEM, FT-IR, XRD and XPS. It was found that the Schiff base copper catalyst and phenylhydrazine were successfully combined onto carboxylated carbon nanotubes through copper coordination. Among of the obtained carbon films, the catalytic carbon film loaded with 500 mu L of phenyl-hydrazine had the highest dissolved oxygen removal efficiency (approximately 99.9%). In addition, it was found that the dissolved oxygen removal performance was positively correlated with the loading of phenylhydrazine. Subsequently, we reduced the amount of oxidation deposition product by more than 50% by simply passing RP-3 through the film in an engineering prototype. Therefore, this paper provided a facile method for removal of dissolved oxygen from RP-3, which had a good application prospect.

Automated summary

In this study, a catalytic carbon film was prepared by combining Schiff base copper catalyst with phenylhydrazine to remove dissolved oxygen efficiently from endothermic hydrocarbon fuel RP-3. The catalytic carbon film effectively reduced the oxidation deposition of RP-3 and showed a promising application prospect in hypersonic vehicles.