【摘要】 聚对苯二甲酸乙二醇酯（PET）塑料可通过水解反应回收成对苯二甲酸（PTA）与乙二醇单体，后续PTA的综合利用具有一定的研究意义。本文以Ru/CeO₂多相催化PTA加氢转化为主要研究对象，通过将可变价氧化物CeO₂载体进行高温氢气还原预处理，尝试使其表面形成更多的氧缺陷与Lewis酸位点，以增强其催化PTA加氢转化反应中的活性。结果表明，经过高温氢气还原的CeO₂载体负载的Ru基催化剂在该反应中的催化活性显著优于未经过处理的样品，其在200～250℃下PTA转化率提高179%～300%，初步推测是由于高温氢气还原处理在载体表面构建了更多的氧缺陷与Lewis酸位点，增强了其对含有富电子芳环的反应物分子的吸附。本工作对于铈基氧化物多相催化剂的优化设计与表面调控具有一定的借鉴意义。更多还原

【Abstract】 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.更多还原