Natural gas processing and methods and systems related thereto
AssigneeSaudi Arabian Oil Company
InventorsSaleh A. ALBENHAMAD, Mohammed J. AL-ALI, Hamad M. AL-FARHAN
Life of this patent
Estimating the term…
Abstract
Optimizing natural gas processing and/or reducing corrosion risk in natural gas processing may include, for example: introducing an acid gas stream to a sour gas feed stream, thereby producing an associated gas stream, wherein the sour gas feed stream originates from a high to low pressure letdown station, and wherein an amount of acid gas stream introduced to the sour gas feed stream is based on an initial H2S/CO2 ratio of the sour gas feed stream; and forming a recycle stream from a portion of the associated gas stream, wherein the recycle stream forms at least a portion of the acid gas stream.
Claims20
A method comprising:
- introducing an acid gas stream to a sour gas feed stream, thereby producing an associated gas stream,
- wherein the sour gas feed stream originates from a high to low pressure letdown station, and the acid gas steam has an H2S concentration from 45 mol % to 55 mol % and a CO2 concentration from 45 mol % to 55 mol %, and
- wherein an amount of the acid gas stream introduced to the sour gas feed stream is based on an initial H2S/CO2 ratio of the sour gas feed stream;
- and
- forming a recycle stream from a portion of the associated gas stream, wherein the recycle stream forms at least a portion of the acid gas stream.
A method comprising:
- calculating an initial H2S/CO2 ratio of a sour gas feed stream;
- introducing a quantity of an acid gas stream to the sour gas feed stream, thereby producing an associated gas stream,
- wherein the acid gas stream has a H2S concentration from 45 mol % to 55 mol % and a CO2 concentration from 45 mol % to 55 mol %, and
- wherein the quantity of the acid gas is based on the initial H2S/CO2 ratio of the sour gas feed stream;
- and
- forming a recycle stream from a portion of the associated gas stream, wherein the recycle stream forms at least a portion of the acid gas stream.
A system comprising:
- an initial H2S/CO2 ratio of a sour gas feed conduit for conveying a sour gas feed stream;
- an acid gas conduit for conveying an acid gas stream, the acid gas conduit fluidly connected to the sour gas feed conduit,
- wherein the acid gas stream has a H2S concentration from 45 mol % to 55 mol % and a CO2 concentration from 45 mol % to 55 mol %, and
- wherein a quantity of the acid gas stream is based on the initial H2S/CO2 ratio of the sour gas feed stream;
- and
- an associated gas conduit for conveying an associated gas stream, wherein the associated gas conduit is fluidly connected to and originates from the acid gas conduit and the sour gas feed conduit, and wherein the associated gas stream has a final H2S/CO2 ratio;
- and
- a recycle conduit for conveying a recycle stream originating from a portion of the associated gas stream, wherein the recycle stream forms at least a portion of the acid gas stream, and wherein a recycle fraction of the associated gas stream is from 1% to 5%.
Dependencies are inferred from the claim text.