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US 11,932,815 B2Granted
Conversion of synthesis gas to liquid fuels
AssigneeExxonMobil Technology and Engineering Company
InventorsAaron R. Garg, Lei Zhang, Micaela Taborga Claure, Stuart L. Soled
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Abstract
Catalyst systems are provided, along with corresponding methods, for single stage conversion of synthesis gas to fuel boiling range products with increased selectivity for either naphtha production (C5-C9) or distillate production (C10-C20). The increased selectivity for naphtha production or distillate production is provided in conjunction with a reduced selectivity for higher boiling range components (C21+).
Claims19
A catalyst system, comprising:
- a hydrocarbon synthesis catalyst comprising 5.0 wt % or more cobalt on an oxide support, relative to the weight of the oxide support;
- and
- an acid catalyst having an Alpha value of 2.0 to 100 comprising an amorphous oxide, a zeotype framework with a pore channel size of 6.5 Angstroms or more, or a combination thereof,
- the hydrocarbon synthesis catalyst and the acid catalyst comprising a catalyst mixture having a weight ratio of the hydrocarbon synthesis catalyst to the acid catalyst between 0.1 and 9.0,
- wherein the acid catalyst further comprises 0.1 wt % to 5.0 wt % of a hydrogenation metal supported on the acid catalyst, relative to the weight of the acid catalyst or wherein the hydrocarbon synthesis catalyst further comprises 0.05 wt % to 2.0 wt % of a promoter metal relative to the weight of the hydrocarbon synthesis catalyst or a combination thereof.
2 more elements
A catalyst system, comprising:
- a synthesis catalyst comprising 5.0 wt % or more cobalt on an oxide support, relative to the weight of the oxide support;
- and
- an acid catalyst having an Alpha value of 80 or more comprising a MWW zeotype framework, a UFI zeotype framework, or a combination thereof, the first synthesis catalyst and the acid catalyst comprising a catalyst mixture having a weight ratio of the first catalyst to the second catalyst between 0.1 and 9.0.
A method for converting a feedstock containing synthesis gas, comprising:
- exposing a feedstock comprising synthesis gas to a catalyst system under conversion conditions comprising a temperature of 190° C. to 280° C. for conversion of 30 vol % or more of the CO in the feedstock to form hydrocarbons, the catalyst system comprising:
- a hydrocarbon synthesis catalyst comprising 5.0 wt % or more cobalt on an oxide support, relative to the weight of the oxide support;
- and
- an acid catalyst having an Alpha value of 100 or less comprising a amorphous oxide, a zeotype framework with a pore channel size of 6.5 Angstroms or more, or a combination thereof,
- the hydrocarbon synthesis catalyst and the acid catalyst comprising a catalyst mixture having a weight ratio of the hydrocarbon synthesis catalyst to the acid catalyst between 0.1 and 9.0,
- wherein the acid catalyst further comprises 0.1 wt % to 5.0 wt % of a hydrogenation metal supported on the acid catalyst, relative to the weight of the acid catalyst or wherein the hydrocarbon synthesis catalyst further comprises 0.05 wt % to 2.0 wt % of a promoter metal relative to the weight of the hydrocarbon synthesis catalyst or a combination thereof.
3 more elements
A method for converting a feedstock containing synthesis gas, comprising:
- exposing a feedstock comprising synthesis gas to a catalyst system under conversion conditions comprising a temperature of 190° C. to 280° C. for conversion of 30 vol % or more of the CO in the feedstock to form hydrocarbons, the catalyst system comprising:
- a hydrocarbon synthesis catalyst comprising 5.0 wt % or more cobalt on an oxide support, relative to the weight of the oxide support;
- and
- an acid catalyst having an Alpha value of 80 or more comprising a MWW zeotype framework, a UFI zeotype framework, or a combination thereof,
- the synthesis catalyst and the acid catalyst comprising a catalyst mixture having a weight ratio of the first catalyst to the second catalyst between 0.1 and 9.0.
2 more elements
Dependencies are inferred from the claim text.