柴油芳烃加氢饱和催化剂载体的设计

Designing of the Supports of Diesel Aromatics Saturation Catalysts

基于柴油中典型芳烃化合物和含硫化合物的分子尺寸以及择形性和溢流氢效应,在第二段加氢工艺中,设计了具有介微复合孔分布的耐硫性催化剂载体。合成出复合分子筛并利用各种表征手段对合成的样品进行了表征。结果表明,复合分子筛不同于同样条件下合成的纯MCM-41和Y型分子筛的机械混合物。它具有介孔和微孔双重孔结构,而且其负载Pd-Pt活性组分后具有优良的芘加氢反应活性和抗硫性。

Based on the molecular dimensions for typical aromatics and sulfur containing compounds in diesel oil , shape selection and hydrogen spillover, a support was designed for sulfur-tolerant catalysts to reduce aromatics at the second stage. For the purpose a novel molecular sieve composite Y was prepared and the as-synthesized samples characterized with a variety of techniques. The results indicate that this composite is different from the mechanical mixture of MCM 41 and NaY under the same condition. It possesses both a modal mesopore system and a microporous structure of zeolite Y. Moreover this catalyst presents, when loaded with PdPt/H（MCM-41/Y）. a promising tolerance to sulfur and a handsome ability of pyrene hydrogenation.