【摘要】 本文采用迎头色谱技术对CoO·MoO₃/γ-Al₂O₃系催化剂的还原性能进行了研究,测定了催化剂的还原度及还原催化剂的可逆吸附氢和不可逆保留氢。结果表明,在我们所研究的催化剂的Co、Mo、Al 组成范围内,在特定的还原条件下,MoO₃与γ-Al₂O₃在焙烧过程中发生作用形成表面络合物,因而易于还原。本文还阐明了还原度、吸氢量同加氢脱硫催化反应活性之间的关系,探讨了还原进行的方式,认为低温时遵从速率限制成核作用机理,高温时遵循瞬间成核收缩球模型机理。更多还原

【Abstract】 The frontal chromatographic technique is used to study the reductionof CoO·MoO₃/γ-Al₂O₃ catalyst.The degree of reduction,the reversibleadsorbed hydrogen（H_R）and the irreversible retained hydrogen（H_I）aredetermined.Within the range of catalyst composition and the reductioncondition studied,it is shown that the interaction between the activecomponents and the support promotes the reduction of the catalyst.Apreliminary study is made on the dependence of the degree of reduction,thequantities of H_R and H_I on the catalyst activity.It is indicated that atlower temperatures the reduction follows the mechanism of rate-control-ed nucleation while at high temperatures the mechanism of instantaneousnucleation-contracting sphere model.更多还原