Process for stabilizing the performance of a catalyst for fischer tropsch reaction

Abstract

Process for maintaining the stability of performances of a catalyst for Fischer-Tropsch reaction, performed in a slurry bubble column reactor under a triphase system, which comprises gradually increasing the PH20 / PH2 ratio and the PH20 / Z ratio, during the start-up phase, with Z = PO . (T / T1) 4 . e-(K2 / (t . K3 )) from 0.4 to 0.8, for a period of time not shorter than 100-150 hrs and not longer than 200-300 hours and, at the end of the start-up phase, maintaining the PH20 / PH2 and PH20 / Z ratios substantially equal to or lower than 0.8.