Accelerated Deactivation and Activity Recovery Studies of Ruthenium and Rhenium Promoted Cobalt Catalysts in Fischer-Tropsch Synthesis

Accelerated deactivation ofco/a1203 catalysts in fischer-tropsch synthesis and theeffect ofre and ru as the catalytic promoters are reported. 15wt% co/a120 3 catalyst and 1wt% ruand 1.4wt% re promoted cobalt catalysts have been formulated and extensively characterized thedeactivation ofthe unpromoted cobalt catalyst and those promoted with re and ru were studied byaccelerated method at 26(fc. different sources of deactivation were identified. the amount ofactivity recovery after regeneration at the conditions of low temperature treatment at 26(fc andhigh temperature treatment at 40(fc for the used promoted and unpromoted catalysts weredetrmined. it was revealed that promoted catalyst deactivated faster than unpromoted ones. hightemperature h2 treatment restored the catalytic activity ofthe catalysts more than 97.5%.