The article investigates the role of the preparation method and heat treatment in the formation of the physicochemical properties of cobalt catalysts on ZSM-5 support. Determination of the main characteristics of the samples showed that the Co/ZSM-5 I catalyst obtained by the impregnation method has the optimal cobalt dispersion and crystallite size.
Keywords: synthesis of hydrocarbons, cobalt, zeolite, preparation of catalysts, heat treatment
The results of studies of the structural and chemical properties of cobalt catalysts on zeolite HY support are presented. The samples were characterized by BET, TPR, TPD-H2, and IR-spectroscopy. It was found that these properties largely depend on the preparation method.
Keywords: Fischer-Tropsch synthesis, active surface, cobalt, zeolite, preparation method
The article presents the results of studying the effect of the loading of active metal on the physicochemical properties of cobalt catalysts for the Fischer-Tropsch synthesis on a silicate support, promoted with aluminum. Using the BET, XRF, TPR, TPD-H2 methods, it has been established that the optimum cobalt content is 15‒18 wt. %.
Keywords: Fischer-Tropsch synthesis, catalyst, cobalt, active component, loading
The article considers the effect of Al2O3 loading on the physical and chemical properties of cobalt catalysts. The loading of the alumina additive has a significant effect on both the phase and texture properties, as well as on the cobalt reduction process in the composition of the studied samples. It was found that with increasing loading of the additive, the specific surface area of the catalysts decreases, and the cobalt recovery process slows down.
Keywords: Fischer-Tropsch synthesis, catalyst, cobalt, alumina, promoter, temperature programmed reduction