Raising Distillate Selectivity and Catalyst Life Time in Fischer-Tropsch Synthesis by Using a Novel Dual-Bed Reactor

In a novel dual bed reactor Fischer-Tropsch synthesis was studied by using two diffrent cobalt catalysts. An alkali-promoted cobalt catalyst was used in the first bed of a fixed-bed reactor followed by a Rutenuim promoted cobalt catalyst in the second bed. The activity, product selectivity and accelerated deactivation of the system were assessed and compared with a conventional single bed reactor system. The methane selectivity in the dual-bed reactor was about ۱۸.۹ % less compared to that of the single-bed reactor. TheC۵+ selectivity for the dual-bed reactor was ۱۰.۹ % higher than that of the single-bed reactor. Accelerated deactivation of the catalysts in the dual-bed reactor was ۴۲ % lower than that of the single-bed reactor. It was revealed that the amount of catalysts activity recovery after regeneration at ۴۰۰ oC in the dual-bed system is higher than that of the single-bed system.

کلیدواژه ها:

Fischer-Tropsch ، Cobalt catalyst ، Dual-bed ، Selectivity ، life time