5-羟甲基糠醛加氢催化剂的性能研究

介绍了负载型5 羟甲基糠醛(HMF)加氢催化剂的制备方法,对所制备的催化剂进行了N₂吸附-脱附等温线、透射电镜、氢氧滴定、吡啶红外等表征,并采用高压反应釜装置对其催化加氢性能进行了评价。比较了Ru、Rh、Pd、Pt 4种贵金属,MoO₃、WO₃、ReO₃ 3种助剂,SiO₂、Al₂O₃、Y型分子筛、S-1分子筛、MCM-41介孔材料5种载体对HMF加氢反应催化剂性能的影响,结果表明,以SiO₂为载体负载Pt及助剂MoO₃制得的催化剂性能较好。HMF呋喃环侧链C—C键和C—O键的断裂是引发后续副反应的重要原因,抑制HMF呋喃环侧链C—C键和C—O 键的断裂是提高HMF加氢反应目标产物选择性的关键。

Catalytic Performances of the Supported Catalysts in the Hydrogenation of 5-Hydroxymethylfurfural

Supported catalysts were synthesized for the hydrogenation of 5-hydroxymethylfurfural (HMF). Catalyst preparation methods were introduced, and the obtained catalysts were characterized by multiple methods, such as N₂ adsorption-desorption isotherm, transmission electron microscope, hydrogen and oxygen titration, and Pyridine-adsorbed fourier transform infrared spectroscopy. Catalytic performance of the catalysts was evaluated in a high pressure stirred tank. Effects of four kinds of noble metal (Ru, Rh, Pd, Pt), three kinds of promoter (MoO₃, WO₃, ReO₃) and five kinds of support (SiO₂, Al₂O₃, Y zeolite, S-1 zeolite, MCM-41 mesoporous material) on the performances of catalysts in HMF hydrogenation process were studied. Results show that it is proper to use SiO₂ as the carrier to support Pt and MoO₃ promoter The rupture of C—C and C—O bonds in the side chains of HMF is an important factor to trigger subsequent side reactions. Thus, restraining the rupture favors increasing the selectivity of the target products in HMF hydrogenation reaction.