Fe/Co-Layered hydroxide-derived mixed metal oxides for efficient conversion of polystyrene to sustainable aviation fuel substitute components under CO2 mediation

The use of plastic catalytic pyrolysis technology for producing aviation fuel substitute components holds broad application prospects in mitigating fossil resource depletion and environmental pollution. In this work, Fe/Co-layered hydroxide-derived mixed metal oxides (CoAl-LDO and FeCoAl-LDO) were prepared and used to catalyze the conversion of polystyrene into aviation fuel substitute components with rich-monocyclic aromatic hydrocarbons. Compared with the CoAl-LDO, FeCoAl-LDO catalyst showed excellent catalytic conversion performance. Especially, the relative content of monocyclic aromatic hydrocarbons within the liquid product reached 63.76% under CO 2 mediation, which had an increase of 9.94% compared to the N 2 . The increase of FeCoAl-LDO mass ratio significantly promoted the generation of monocyclic aromatic hydrocarbons, which reaches its maximum value of 73.32%. In terms of liquid components, the carbon number of aromatic components primarily falls within C7-C12, aligning with the usage range for aviation fuel substitute components. And, the proportion of light aromatic hydrocarbons reached 71.58%. This research highlights the promise of the FeCoAl-LDO catalyst in the production of aviation fuel substitute components under CO 2 mediation, thereby providing vital support for the development of sustainable aviation fuel.