Patent ID: 7226954
Filing Date: 2007-06-05
Classification: C10G

Abstract:
1. An integrated process for producing liquid fuels, the process comprising: a) subjecting syngas with a hydrogen/carbon monoxide ratio of 0.5 to 2.0 to Fischer-Tropsch reaction conditions at pressures in the range of 10 bar and 40 bar and temperatures in the range of 180° C. and 220° C. in one of a slurry reactor and a fixed-bed reactor charged with a first catalyst, which catalyst is an alkali-promoted cobalt-based catalyst; b) optionally removing at least one of water and heavy hydrocarbons from the product stream; c) subjecting the product from one of step a) and step b) together with one of syngas of a hydrogen/carbon monoxide ratio higher than that of step a) and hydrogen to Fischer-Tropsch reaction conditions at pressures in the range between 10 bar and 40 bar and temperatures in the range of 200° C. and 250° C. in a slurry reactor or fixed-bed reactor charged with a second catalyst, said second catalyst being a promoted cobalt-based catalyst having a higher activity than said first catalyst; d) optionally removing at least one of water and liquid hydrocarbons from the product stream of c); and e) subjecting the product from one of step c) and d) together with syngas to Fischer-Tropsch reaction conditions at pressures in the range between 10 bar and 40 bar and temperatures in the range of 200° C. and 250° C. in the presence of a third catalyst, said third catalyst being a promoted cobalt-based catalyst having a higher activity than at least said first catalyst.