钛锆复合载体负载Pt—Pd催化剂的制备及加氢脱芳性能的研究

采用改进的溶胶一凝胶法制备钛锆（TiO2-ZrO2）复合氧化物载体，并用X射线衍射和N2吸附对样品进行表征。随着钛锆摩尔比的不同，复合载体具有不同的晶型结构，且实验证明对催化剂的活性有较大的影响。在小型连续固定床反应器上对TiO2-ZrO2复合载体负载Pt-Pd催化剂上进行加氢脱芳活性评价，结果表明，该催化剂性能优异，有较强的抗硫性能。

Preparation of Pt-Pd/TiO2-ZrO2 Catalyst and Study of Its Hydrodearomatics Performance

In this paper titanium-zirconium mixed oxides with different molar ratio of Ti to Zr was prepared by improved sol-gel method. The supporters were characterized by means of BET, XRD methods, and the results showed that the TiO_2-ZrO_2 mixed supporter had much better specific surface, pore structure and textures properties than the single support or the mixed support prepared by the conventional sol-gel method. The crystal phase of the mixed supporter changed as the molar ratio of titanium to zirconium, which affected its catalytic activity. The hydrodearomatics performance of Pd-Pt/TiO_2-ZrO_2 catalyst was investigated on the fixed-bed reactor. The results indicated that the catalyst had excellent hydrodearomatics activities, and showed a stronger sulfur tolerance performance.