The demand for oxygen-containing plastics has grown rapidly due to their outstanding comprehensive properties, rendering the disposal of plastic waste an urgent environmental challenge. Among existing treatment methods, catalytic hydrogenolysis within chemical recycling is recognized as a green strategy aligned with sustainable development, as it can directionally convert oxygen-containing plastics into high-value chemicals (e.g., monomers, fuels). Homogeneous catalysts possess notable potential in this field by virtue of advantages such as mild reaction conditions and controllable product selectivity. This review systematically summarizes recent research progress in homogeneous catalysts for the catalytic hydrogenolysis of oxygen-containing plastics, focusing on catalyst design, reaction condition optimization, product regulation mechanisms, and structure-activity relationships, which offers theoretical reference for advancing the industrialization of this technology.

In order to study the correlation between the mass transfer performance of fluid catalytic cracking (FCC) catalysts and their pore structure and acidity,three semi synthetic FCC catalyst samples(CAT1,CAT2,CAT3) with different pore structure and acidity were prepared.Naphthalene,phenanthrene and acridine were selected as probe molecules to test the adsorption penetration performance of the guest molecules on the catalysts and to investigate their mass transfer performance.The ability of acid center conversion on catalysts was visualized and analyzed using super-resolution imaging technology.The results show that effective discrimination of the differential adsorption behavior of FCC catalysts for macromolecules can be achieved by selecting suitable probe molecules.The mass transfer performance of macromolecules on FCC catalysts depends on the pore structure and surface acidity of the catalysts.The use of novel macroporous matrix materials optimizes the mass transfer performance of FCC catalysts and enhances the acid on Y molecular sieves in FCC catalysts centers in FCC catalysts.The work can provide an effective solution for studying the mass transfer structure-activity relationship of FCC catalysts,and also provide theoretical guidance for the design of efficient FCC catalysts.

Pt0.5?Snx/γ?Al₂O₃ catalysts with different Sn loads were prepared by constant volume sequential impregnation method and ultrasonic shock method to improve metal dispersion. The catalysts were characterized by XRD, BET, H₂?TPR, CO?IR and TG, and the effects of Sn content on the active center structure and propane dehydrogenation performance of Pt0.5?Snx/γ?Al₂O₃ catalysts were investigated. The results showed that adjusting the n（Pt）/n（Sn） by changing the Sn content in the samples would lead to the difference in the spatial distribution of Pt and Sn species, and thus affect the mode of action between Pt and Sn. With the increase of Sn, the interaction between Pt?Sn helps to increase the dispersion of Pt, the number of active sites, the improvement of the reaction activity of the catalyst. However, when excessive Sn is introduced, a Pt?Sn alloy is formed, resulting in the coating of Pt, resulting in a decrease in the number of active sites and a decline in the reactivity.

The hierarchical zeolite has become a hotspot in the current molecular sieve research field due to its advantages of efficient mass transfer and shape selection catalysis.The unclear mass transfer optimization mechanism has become a bottleneck restricting the design and development of hierarchical zeolite.This paper briefly introduces recent research and development status of the hierarchical zeolite,reviewes with emphasis the research progress in mass transfer mechanism of Hierarchical zeolite,the current research challenges and the analysis of current research strategy etc,and discussed the significance of mass transfer mechanism in the research and development of graded porous molecular sieve materials and the prospect of future development.