Abstract

The composition, structure, catalytic activity, and stability of ruthenium catalytic systems prepared using natural aluminosilicate nanotubes as a support were studied. The influence of the preparation procedure on the morphology of ruthenium nanoparticles selectively formed inside mesoporous aluminosilicate nanotubes was examined. The activity and stability of catalysts in the model reaction of benzene hydrogenation in the presence of water [V(C₆H₆) = V(H₂O), 80°C, hydrogen pressure 3.0 MPa, reaction time 3 h] were studied. The catalyst containing 1.02 wt % ruthenium, prepared by reduction of the ruthenium ethylenediaminetetraacetate complex in a hydrogen stream at 400°С, exhibits higher activity (the benzene conversion in the 3-h reaction was 100%) and higher stability in the reaction (the benzene conversion after three reaction cycles was 95%) compared to the system with the similar ruthenium content (0.98 wt %) prepared by reduction with a sodium borohydride solution. The reduction with hydrogen leads to the formation of highly stable ruthenium nanoparticles with the mean diameter of 2 nm, tightly bound to the internal surface of aluminosilicate nanotubes.

中文翻译：

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硅酸铝纳米管内表面制备钌纳米颗粒的方法对水存在下苯加氢催化性能的影响

摘要

研究了以天然铝硅酸盐纳米管为载体制备的钌催化体系的组成，结构，催化活性和稳定性。考察了制备工艺对在介孔硅铝酸盐纳米管内选择性形成的钌纳米颗粒形貌的影响。在水[ V（C ₆ H ₆）= V（H ₂）存在下，苯加氢模型反应中催化剂的活性和稳定性O），80°C，氢气压力3.0 MPa，反应时间3 h]。通过在400°C的氢气流中还原乙二胺四乙酸钌络合物制备的含1.02 wt％钌的催化剂具有较高的活性（3-h反应中的苯转化率为100％）和较高的反应稳定性（与通过硼氢化钠溶液还原制得的钌含量相似（0.98 wt％）的体系相比，三个反应周期后的苯转化率为95％）。氢还原导致形成平均直径为2 nm的高度稳定的钌纳米颗粒，该纳米颗粒紧密结合到硅铝酸盐纳米管的内表面。