载体还原处理提高Ru/CeO2催化对苯二甲酸加氢转化性能.

Polyethylene terephthalate (PET) plastics can be recovered into terephthalic acid (PTA) and ethylene glycol monomers through hydrolysis reactions, and the comprehensive utilization of terephthalic acid has certain research significance. In this paper, Ru/CeO2 catalyzed PTA hydro-conversion reaction is researched. Attempts of generating more oxygen vacancies and Lewis acid sites on Ru/CeO2 by high-temperature reduction in H2 are made for boosting the catalytic activity in PTA hydro-conversion. Ru-based catalysts with pre-reduced CeO2 support exhibits significant enhanced activity in PTA hydro-conversion, as the PTA conversion is raised by 179%~300% under 200~250℃. The enhancement in catalytic activity by reduction pretreatment of CeO2 support is attributed to enhanced adsorption of PTA reactant due to newly generated Lewis acid sites. This work provides useful insights for rational design and precise surface regulation for Ce-based heterogeneous catalysts. [ABSTRACT FROM AUTHOR]