高分散[Pd-Pt]/C催化喹啉加氢制备1,2,3,4-四氢喹啉

Selective hydrogenation of quinoline to 1,2,3,4-tetraquinoline over highly dispersed [Pd-Pt]/C catalysts

摘要:

利用双表面活性剂( Tween-20和Brij-35 )保护的方法，合成并表征了一系列[Pd-Pt]/C催化剂。将其应用于喹啉催化加氢制备1,2,3,4-四氢喹啉反应中，结果表明，5wt%[Pd-Pt(1:3)]/C的催化活性最高。优化反应参数，以乙醇为溶剂，初始底物浓度为2.4mol/L，在130℃, 2.5MPa下反应50min，喹啉转化率100%，1,2,3,4-四氢喹啉选择性100%。

Abstract:

Two kinds of surfactants were used to synthesize a series of [Pd-Pt]/C bimetallic catalysts. These catalysts were characterized and used in selective hydrogenation of quinoline to 1,2,3,4-tetraquinoline. The 5wt%[Pd-Pt(1:3)]/C hold the highest activity among these catalysts. The effect of solvent，temperature，pressure and the initial concentration on the reaction was studied. The conversion of quinoline was 100% and the selectivity of 1,2,3,4-tetraquinoline was up to 100% under optimal reaction conditions: c( quinoline) = 2.4 mol /L,130℃,2.5 MPa, 50min.