Hydrocarbon composition for use in compression-ignition engines
AssigneeSasol Technology (Pty) Ltd
InventorsLuis Pablo Fidel Dancuart Kohler, Thabiet Booley, Delanie Lamprecht
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Abstract
The invention provides a hydrocarbon composition for use in CI engines, said composition comprising a blend of hydrocarbons derived from a LTFT and from a HTFT process, said LTFT derived hydrocarbon being blended with said HTFT derived hydrocarbon in a volumetric ratio of from 1:20 to 20:1. The invention further provides a process for the production of the hydrocarbon composition and a the fuel composition including, in addition to the hydrocarbon composition, one or more component selected from the group including a crude oil derived diesel fuel, a crude oil derived naphtha, a lubricant or light cycle oil (LCO).
Claims15
A process for the production of a hydrocarbon composition for use in a fuel for compression ignition engines, said process consisting essentially of the steps of:
- a. producing two or more synthesis gas products from a solid, liquid or gaseous carbonaceous feedstock by at least one synthesis gas production process, wherein the two or more synthesis gas products are blended;
- b. subjecting the two or more synthesis gas products to a High Temperature Fischer-Tropsch synthesis to obtain a first synthetic hydrocarbon and water, wherein the first synthetic hydrocarbon has a sulphur content of below 5 ppm and a density of from 0.800 to 0.845 kg/l at 15° C.;
- c. subjecting the two or more synthesis gas products to a Low Temperature Fischer-Tropsch synthesis to obtain a second synthetic hydrocarbon and water, wherein the second synthetic hydrocarbon has a sulphur content of below 5 ppm;
- d. hydroconverting at least a fraction of the first synthetic hydrocarbon to produce one or more High Temperature Fischer-Tropsch process-derived hydrocarbons in the boiling range of from 150° C. to 390° C.;
- e. hydroconverting at least a fraction of the second synthetic hydrocarbon to produce one or more Low Temperature Fischer-Tropsch process-derived hydrocarbons in the boiling range of from 150° C. to 390° C.;
- and
- f. blending the hydrocarbons produced in steps d. and e. to form a hydrocarbon composition for use in a fuel for compression ignition engines, wherein the hydrocarbon composition has a sulphur content of below 5 ppm, a paraffin content of at least 75 vol. %, and an aromatics content above 9 mass %.
A process for the production of a hydrocarbon composition for use in a fuel for compression ignition engines, said process consisting essentially of the steps of:
- a. producing two or more synthesis gas products from a solid, liquid or gaseous carbonaceous feedstock by at least one synthesis gas production process, wherein the two or more synthesis gas products are blended;
- b. subjecting the blended two or more synthesis gas products to a High Temperature Fischer-Tropsch synthesis to produce a first synthetic hydrocarbon composition and water, wherein the first synthetic hydrocarbon has a sulphur content of 0.0003 mass % and a density of from 0.800 to 0.845 kg/l at 15° C.;
- c. subjecting at least a fraction of the first synthetic hydrocarbon to hydrocracking, hydrotreatment and distillation to produce one or more High Temperature Fischer-Tropsch process-derived hydrocarbons in a boiling range of from 150° C. to 390° C.;
- d. subjecting the blended two or more synthesis gas products to a Low Temperature Fischer-Tropsch synthesis to produce a second synthetic hydrocarbon and water, wherein the second synthetic hydrocarbon has a sulphur content of <0.0001 mass %;
- e. subjecting at least a fraction of the second synthetic hydrocarbon to hydrocracking, hydrotreatment and distillation to produce one or more Low Temperature Fischer-Tropsch process-derived hydrocarbons in the boiling range of from 150° C. to 390° C.;
- and
- f. blending at least one of the one or more High Temperature Fischer-Tropsch process-derived hydrocarbons and at least one of the one or more Low Temperature Fischer-Tropsch process-derived hydrocarbons to form a hydrocarbon composition for use in a fuel for compression ignition engines, wherein the hydrocarbon composition has a sulphur content of below 5 ppm, a paraffin content of at least 75 vol. %, and an aromatics content above 9 mass %.
A process for the production of a hydrocarbon composition for use in a fuel for compression ignition engines, said process consisting essentially of the steps of:
- a. producing two or more synthesis gas products from a solid, liquid or gaseous carbonaceous feedstock by at least one synthesis gas production process, wherein the two or more synthesis gas products are blended;
- b. subjecting the blended two or more synthesis gas products to a High Temperature Fischer-Tropsch synthesis to produce a first synthetic hydrocarbon and water, wherein the first synthetic hydrocarbon has a sulphur content of 0.0003 mass % and a density of from 0.800 to 0.845 kg/l at 15° C.,
- c. subjecting the blended two or more synthesis gas products to a Low Temperature Fischer-Tropsch synthesis to produce a second synthetic hydrocarbon and water, wherein the second synthetic hydrocarbon composition has a sulphur content of <0.0001 mass %;
- d. blending at least a fraction of the first synthetic hydrocarbon and at least a fraction of the second synthetic hydrocarbon to obtain a synthetic hydrocarbon blend;
- and
- e. subjecting at least a fraction of the synthetic hydrocarbon blend to hydrocracking, hydrotreatment and distillation to produce a hydrocarbon composition for use in a fuel for compression ignition engines, wherein the hydrocarbon composition has a sulphur content of below 5 ppm, a paraffin content of at least 75 vol. %, and an aromatics content above 9 mass %.
Dependencies are inferred from the claim text.