Ifp Energies Nouvelles

Eni S.p.a.

Adrien Berliet

Sylvie Maury

Fabrice Diehl

Joseph Lopez

The invention has as its object a method for preparation of catalysts based on cobalt substrates, implementing a concatenation of stages for impregnation, drying and calcination under particular conditions. The invention also relates to the use of said catalysts in Fischer-Tropsch synthesis methods.

Method for preparing cobalt-based catalysts

Preparation of a catalyst comprising at least one metal from group VIII said process comprising stabilization of an oxide support, by impregnation of said oxide support, rapid drying, calcination of impregnated and dried oxide support, stabilization stage being followed at least once by impregnation of stabilized oxide support, drying of stabilized and impregnated oxide support operating in a fluidized bed in the presence of a gas, said support being subjected to a temperature rise ramp of between 0.5 and 5&#xb0; C/min to attain a temperature of between 50 and 170&#xb0; C, the residence time of said support once the drying temperature is reached being between 20 and 180 min, and calcination of said dried impregnated stabilized oxide support.

Process for the preparation of a catalyst using at least one rapid drying stage and at least one fluidised bed drying stage and use thereof for fischer-tropsch synthesis

The present invention concerns a process for the preparation of a catalyst comprising an active phase comprising at least one metal from group VIII selected from cobalt, nickel, ruthenium and iron, alone or as a mixture, and an oxide support which can be used in a Fischer-Tropsch synthesis process comprises at least once the linked sequence of a stage for impregnation of said oxide support, a drying stage in which said impregnated oxide support is entrained by means of a gas, said impregnated oxide support being subjected in said stage to a temperature rise ramp of between 250 and 600&#xb0; C./min, the residence time of said impregnated oxide support in said drying stage being between 1 second and 1 minute, and a stage for calcination of said dried impregnated oxide support. The invention also concerns a Fischer-Tropsch synthesis process using the catalyst prepared according to the preparation process.

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Lyons, France

Adrien Berliet