【摘要】 本文主要研究了γ-Al-5O₂载体上Ni-Mo催化剂的表面分散模型.催化剂制备采用先Ni后Mo的二次浸渍方法,XPS实验结果表明活性组份是大致以单层分散在载体表面上.更多还原

【Abstract】 This paper is concerned with the dispersive model on the surface of Ni-Mo catalysts. Although the catalysts were prepared with double impregnation, it was found by XPS that active ingredients were well dispersed on the surface of the support a’nd did not cover each other. A monolayer model was proposed instead of a "bilayer" structure suggested by some literatures.The HDN experiments showed that activity of catalysts varied with the composition of catalysts and reached, a maximum at 3.5%(wt) NiO-14.5%(wt)MoO3. The similar result was reported for HDS in some literatures and explained by the synergism-by-contact model proposed by Delmon et al. It is apparent that the result in this paper could not be explained by that model.更多还原