Catalysts
The present disclosure relates to improvements in the design of Fischer-Tropsch catalysts comprising a support and cobalt on the support.
1. A method of conducting a Fischer Tropsch reaction comprising using a catalyst in a microchannel reactor, the catalyst being an activated catalyst precursor comprising:
(i) a catalyst support comprising silica and at least 11 wt % TiO 2 ; and
(ii) cobalt on the catalyst support,
wherein the performance of the catalyst is substantially maintained over a reaction period of about 5000 hours or more without regeneration of the catalyst, such that the contact time is less than 500 milliseconds, the CO conversion is greater than 50% and the methane selectivity is less than 15%.
2. The method of claim 1 , wherein the reaction period is about 8000 hours or more.
3. A method of conducting a Fischer Tropsch reaction comprising using a catalyst which is an activated catalyst precursor comprising:
(i) a catalyst support comprising silica and at least 11 wt % TiO 2 ; and
(ii) cobalt on the catalyst support,
Wherein the deactivation rate of the catalyst measured as percent loss of CO conversion per day is 0.09% or less over a reaction period of about 5000 hours or more.
4. The method of claim 3 , wherein the reaction period is about 8000 hours or more.
5. The method of claim 3 , wherein the reaction is carried out in a microchannel reactor.
6. A method of conducting a Fischer Tropsch reaction comprising using a catalyst derived from a catalyst precursor comprising:
(i) a catalyst support comprising silica and at least 11 wt % TiO 2 ; and
(ii) cobalt on the catalyst support,
the Fischer Tropsch reaction conducted in a microchannel reactor, wherein the performance of the catalyst is substantially maintained over a reaction period of about 5000 hours or more without regeneration of the catalyst, such that the contact time is less than 500 milliseconds, the CO conversion is greater than 50% and the methane selectivity is less than 15%.
7. The method of claim 6 , wherein the reaction period is about 8000 hours or more.
8. A method of conducting a Fischer Tropsch reaction comprising using a catalyst derived from a catalyst precursor comprising:
(i) a catalyst support comprising silica and at least 11 wt % TiO 2 ; and
(ii) cobalt on the catalyst support,
wherein the deactivation rate of the catalyst measured as percent loss of CO conversion per day is 0.09% or less over a reaction period of about 5000 hours or more.
9. The method of claim 8 , wherein the reaction period is about 8000 hours or more.
10. The method of claim 8 , wherein the reaction is carried out in a microchannel reactor.