Mo（W）－Co（Ni，Fe）簇合物的加氢脱硫催化活性

对线型、立方烷型和笼状３种不同构型的Ｍｏ（Ｗ）－Ｃｏ（Ｎｉ，Ｆｅ）－Ｓ（Ｏ）簇共１２种化合物进行了噻吩加氢脱硫和环己烯加氢的催化活性研究．讨论了簇合物的组成，金属原子的配比、价态与催化活性的关系．探讨了不同构型对活性的影响．

INVESTIGATION ON HYDRODESULFURIZATION OF CATALYSTS DERIVED FROM A SERIES OF Mo(W) -Co(Ni, Fe) CLUSTERS

The thiophene HDS and cyclohexene HYD reactions on the catalysts derived from 12 kinds of Mo (W) -Co (Ni, Fe) cluster which are divided into three types: linear, cage and cubicane were studied. The relationship of the composition, the ratio and the valence of the metal atoms in these clusters with the catalytic activity has been discussed,and the effect of the configuration of the clusters on the activity has been explored as well. The results are as following: (1) The HDS and HYD activities of Mo and Co (or W and Ni) clusters are higher than that of the mechanically mixed system in which the same atom ratio as the cluster is used; (2) the HDS catalytic activity of the. Mo-Co clusters with cubicane structure is higher than that of other Mo-Co clusters, demonstrating that the configuration and component of this kind cluster are favorable to HDS catalysis; (3) Ni plays remarkable role of promotion for W, particularly, when Ni and W are formed into cage type cluster and the number of Ni atom is only one ninth of that of W,HDS and HYD activities of the cluster are very high. This shows that the catalysts probably form some Co-Mo-S(or W-Ni-S) cluster active phase displaying synergistic catalysis in the HDS process.