Insights into in-situ catalytic degradation of plastic wastes over zeolite-based catalyst from perspective of three-dimensional pore structure evolution

Insightfully understanding the process of volatiles from plastic depolymerization entering exterior into internal structure catalyst favors to rationalize design in scale-up principles. Herein, catalytic degradation wastes with fluid cracking (FCC) was investigated in-depth. The yield and composition liquid gas products over various FCCs were studied quantitatively. structural evolution on overall scope, including topology heterogeneous pore systems spatial distribution zeolite probed by X-ray nano-CT. results showed that FCC enhanced transformation C16-C30 chains C9-centered monocyclic aromatics. nano-CT analysis illustrated remarkable loss porosity after reaction, particularly at depth ?16.5? m outmost layer. While interior pores marginally affected, indicating large hydrocarbons incapable engaging active sites full advantage, which preferably occupied large-size (>385 nm) external surface.