| he nickel-promoted molybdena on alumina (Ni-Mo/;A structural scheme, describing all the identified Ni and Mo phases, was established. In the calcined state, Mo is visualized as dispersed, mostly one-layered 'islands,' linked to the alumina surface via oxide ions. The promoting Ni, tetrahedrally coordinated, was shown to locate along the periphery of these 'islands.' Upon sulfiding, Mo is converted into layered ;Guides to an optimized catalyst were also proposed. The impregnation sequence--first Ni and then Mo--was thought to be important in preparing more active catalysts, having smaller Mo 'islands' and more tetrahedral Ni. For a ;Magnetic measurements proved to successfully identify and quantify the tetrahedral Ni. The Faraday system with simplified experimental procedures is recommended as a useful characterization test for screening development catalysts and for quality control.;Industrial production routes were used to prepare a series of catalysts with various... |
PDF Full Text Request