Removing contaminants from natural gas
AssigneeShell Oil Company
InventorsRobert Amin, Casper Krijno Groothuis
Life of this patent
Estimating the term…
Abstract
A process for removing contaminants from a natural gas feed stream including water and sour species is provided, which process comprises the steps of cooling the natural gas feed stream in a first vessel (12) to a first operating temperature at which hydrates are formed and removing from the first vessel (12) a stream of dehydrated gas (34); and cooling the dehydrated gas in a second vessel (14) to a second operating temperature at which solids of the sour species are formed or at which the sour species dissolve in a liquid and removing from the second vessel (14) a stream of dehydrated sweetened gas (62).
Claims19
A process for removing contaminants from a natural gas feed stream containing water and a sour species comprising:
- dehydrating the natural gas feed stream in a first vessel;
- removing from the first vessel a stream of dehydrated gas;
- cooling the dehydrated gas in a second vessel to a second operating temperature at which solids of the sour species are formed or at which the sour species dissolve in a liquid;
- removing from the second vessel a stream of dehydrated sweetened gas;
- wherein dehydrating the natural gas feed stream comprises cooling the natural gas feed stream in the first vessel to a first operating temperature to form hydrates;
- and
- wherein cooling the natural gas feed stream comprises introducing the natural gas feed stream and a stream of liquid into the first vessel at a temperature that is below the first operating temperature to form a slurry with the hydrates.
A process for removing contaminants from a natural gas feed stream containing water and a sour species comprising:
- dehydrating the natural gas feed stream in a first vessel;
- removing from the first vessel a stream of dehydrated gas;
- cooling the dehydrated gas in a second vessel to a second operating temperature at which solids of the sour species are formed or at which the sour species dissolve in a liquid;
- removing from the second vessel a stream of dehydrated sweetened gas;
- wherein cooling the dehydrated gas comprises introducing the dehydrated gas and a stream of liquid into the second vessel at a temperature that is below the second operating temperature to form a slurry or mixture with the sour contaminants.
A process for removinu contaminants from a natural gas feed stream containing water and a sour species comprising:
- dehydrating the natural gas feed stream in a first vessel;
- removing from the first vessel a stream of dehydrated gas;
- cooling the dehydrated gas in a second vessel to a second operating temperature at which solids of the sour species are formed or at which the sour species dissolve in a liquid;
- removing from the second vessel a stream of dehydrated sweetened gas;
- wherein dehydrating the natural gas feed stream comprises cooling the natural gas feed stream in the first vessel to a first operating temperature to form hydrates;
- and
- further comprising heating the hydrates in the first vessel to a temperature that is above the first operating temperature thereby producing a water-containing liquid.
A process for removing contaminants from a natural gas feed stream containing water and a sour species comprising:
- dehydrating the natural gas feed stream in a first vessel;
- removing from the first vessel a stream of dehydrated gas;
- cooling the dehydrated gas in a second vessel to a second operating temperature at which solids of the sour species are formed or at which the sour species dissolve in a liquid;
- removing from the second vessel a stream of dehydrated sweetened gas;
- and
- further comprising heating the sour species in the second vessel to a temperature that is above the second operating temperature thereby producing a sour species-containing liquid.
Dependencies are inferred from the claim text.