Desulfurization Mechanisms on Sulfido Bimetallic Clusters

该奖项在无机，生物无机和有机物计划 继续支持M博士的研究。大卫柯蒂斯 密歇根大学化学系，关于模型的反应性 用于脱氢硫化（HDS）催化剂的络合物。 具体 该项目的目标是确定（1）如何组成， 物理和电子结构，以及钼或 硫化钨簇合物与它们对有机物的反应性相关 含硫化合物;（2）脱硫反应机理 金属簇合物介导的;以及（3） 离散簇上的脱硫与 脱硫的非均相加氢脱硫催化剂中使用的 石油工业的燃料升级。 实验方法 这些目标包括合成新的硫化物 团簇与有机物反应的动力学和结构研究 硫化合物，电化学研究，以及与 实际的多相催化剂。 特别令人感兴趣的是， 用铁“促进”的硫化钼催化剂催化的反应， 以及助催化剂金属在提高催化剂活性方面所起的作用。 催化剂的活性。 加氢脱硫（HDS）是一种工业化的脱硫工艺 因此在制造业中很重要， 改善工业区的空气质素。 在这个项目中，化合物 其为工业催化剂的模型， 反应性研究。 对机械作用的认识 脱硫催化剂中的助剂可应用于 “第二代”加氢处理催化剂具有更高的 活动和选择性比目前使用的。

This award in the Inorganic, Bioinorganic, and Organometallic Program provides continued support for research by Dr. M. David Curtis of the Chemistry Department, University of Michigan, on the reactivity of model complexes for dehydrosulfurization (HDS) catalysts. The specific objectives of the project are to determine (1) how the composition, physical and electronic structure, and redox properties of molybdenum or tungsten sulfide clusters correlate with their reactivity toward organic sulfur compounds; (2) the mechanisms of the desulfurization reactions mediated by the metal cluster complexes; and (3) how the mechanisms of desulfurizations on discrete clusters are related to the mechanisms of desulfurization over the heterogeneous HDS catalysts used in the petroleum industry for fuel upgrading. The experimental approaches to these objectives include the synthesis of new sulfide bimetallic clusters, kinetic and structural studies of their reactions with organic sulfur compounds, electrochemical studies, and comparative studies with actual heterogeneous catalysts. Of particular interest are those HDS reactions catalyzed by molybdenum sulfide catalysts `promoted` with iron, cobalt, or nickel and the role played by the promoter metal in increasing the activity of the catalyst. Hydrodesulfurization (HDS) is a commercial process used to remove sulfur from organic materials and is therefore important in manufacturing and to enhancing air quality in industrial areas. In this project, compounds which are models of the industrial catalyst will be prepared and their reactivity investigated. Knowledge of the mechanistic role of the promoter in desulfurization catalysts can be applied to the design of `second generation` hydrotreating catalysts that possess higher activities and selectivities than those currently in use.