Hydrogenation reactions of two vanadyl porphyrins are performed over a series of NiMo/Zr-SBA-15 catalysts and an industrial NiMo/γ-Al₂O₃ catalyst. The results validate that the diffusion of the porphyrins suffers significant hindrance in the catalyst pores, which make a pronounced effect on the reaction. The hydrogenation of vanadyl-TPP receives a much larger diffusion effect than vanadyl octaethylporphine, which attributes to its higher intrinsic activity and more severe diffusion resistance. The restrictive correlation indicates two vanadyl porphyrins are hindered more severely as diffusing through the orderly NiMo/Zr-SBA-15 catalysts than the theoretical prediction from the Renkin equation, which results from the non-spherical configuration of the reactants and simultaneous counter diffusion of the products. Hydrogenation reactions of the vanadyl porphyrins encounter a stronger internal diffusion restriction in the NiMo/γ-Al₂O₃ catalyst than in the NiMo/Zr-SBA-15 catalysts, attributing to the random structure of the γ-Al₂O₃ support.

在一系列 NiMo/Zr-SBA-15 催化剂和工业 NiMo/γ-Al ₂ O _{3催化剂上进行两种钒基卟啉的加氢反应}催化剂。结果验证了卟啉的扩散在催化剂孔中受到显着阻碍，这对反应产生显着影响。氧钒-TPP的氢化作用比八乙基卟啉氧钒具有更大的扩散效应，这归因于其更高的内在活性和更严重的扩散阻力。限制性相关性表明，两种氧钒在通过有序 NiMo/Zr-SBA-15 催化剂扩散时受到的阻碍比 Renkin 方程的理论预测更严重，这是由于反应物的非球形构型和同时逆向扩散造成的。产品。钒基卟啉的加氢反应在 NiMo/γ-Al ₂ O _{3中遇到更强的内部扩散限制}与 NiMo/Zr-SBA-15 催化剂相比，这归因于 γ-Al ₂ O ₃载体的无规结构。