The conversion of levulinic acid over rhenium oxide catalysts supported on ZrO₂ and SiO₂ in a batch reactor at 200 °C and 5 MPa of H₂ pressure was studied. The catalysts were prepared by incipient wetness impregnation with nominal loadings of 5–18 wt.%. The catalysts were characterized by N₂ physisorption, field emission scanning electron microscopy, X-ray diffraction, H₂-temperature programmed reduction, Fourier transform infrared spectroscopy of adsorbed pyridine, and X-ray photoelectron spectroscopy. The catalysts were highly active and selective to γ-valerolactone. Catalytic activity, expressed as initial reaction rate and based on catalyst weight, was correlated with dispersion. The difference in the activity trend was attributed to ReO_x-support interaction: ZrO₂ interacted more strongly with ReO_x and modified the electronic character of the sites, whereas SiO₂ interacted weakly with ReO_x, leading to unmodified Re active sites, irrespective of Re loading. All the catalysts exceeded 90 % selectivity to GVL.

研究了在 200 °C 和 5 MPa 的 H ₂压力下在间歇式反应器中负载在 ZrO ₂和 SiO ₂上的氧化铼催化剂上乙酰丙酸的转化。催化剂是通过初湿浸渍制备的，标称负载量为 5-18 重量％。催化剂通过N ₂物理吸附、场发射扫描电子显微镜、X 射线衍射、H ₂-程序升温还原、吸附吡啶的傅里叶变换红外光谱和 X 射线光电子能谱。该催化剂对γ-戊内酯具有高活性和选择性。以初始反应速率表示并基于催化剂重量的催化活性与分散相关。活性趋势的差异归因于 ReO _x载体相互作用：ZrO ₂与 ReO _{x 的}相互作用更强并改变了位点的电子特性，而 SiO ₂与 ReO _{x 的}相互作用较弱，导致未修饰的 Re 活性位点，无论重新加载。所有催化剂对 GVL 的选择性都超过 90%。