Systems and Methods For Using Cold Liquid To Remove Solidifiable Gas Components From Process Gas Streams
AssigneeExxonMobil Upstream Research Company
InventorsRobert D. Kaminsky, Moses Minta
Life of this patent
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Abstract
Systems and methods are described for re-moving solidifiable gas from a process gas stream by direct contact with a cold liquid. The process gas stream includes at least gas that is frozen by the cold liquid while one or more other gases of the process gas stream remain in a gaseous state. The process gas stream may include water, and will have a different composition than the cold liquid. The contacting of the cold liquid with the process gas stream may be at a pressure that is less than 200 psia, and optionally less than 100 psia, 50 psia, or even 30 psia, and the solidified gas may be removed from the contacting assembly as a slurry with cold liquid.
Claims56
A method for removing a solidifiable gas component from a process gas stream, the method comprising:
- (a) contacting a process gas stream containing a solidifiable gas component with a cold liquid at a contacting temperature and a contacting pressure to form a liquid-solid slurry containing the cold liquid and solids formed by solidifying the solidifiable gas at least a portion of the solidfiable component in the process gas stream;
- wherein:
- the contacting further forms a treated gas stream containing a portion of the process gas stream that was not solidified by the contacting with the cold liquid;
- the cold liquid is at a temperature at which the solidifiable gas component within the process gas stream will transition to a solid phase;
- the cold liquid has a different composition than the solidifiable gas component;
- and
- the process gas stream includes at least one gas component that remains in a gas phase at the contacting temperature and the contacting pressure;
- and
- (b) removing at least a portion of the solids from the slurry
A system for removing a solidifiable gas component from a process gas stream by direct contact with a cold liquid, the system comprising:
- a cold liquid supply containing cold liquid having a cold liquid temperature;
- a process gas source containing process gas containing gases that include a solidifiable gas component having a freezing point and at least one other gas component having a freezing point that is lower than the freezing point of the solidifiable gas component;
- a contacting assembly adapted to receive a cold liquid stream containing cold liquid from the cold liquid supply, a process gas stream containing process gas from the process gas source, and to directly contact the cold liquid with the process gas at a contacting temperature and a contacting pressure to produce a liquid-solid slurry and a treated gas stream, wherein the slurry contains the cold liquid and solids formed from the solidifiable gas component, and further wherein the treated gas stream contains the at least one other gas component;
- and
- a separation assembly adapted to remove the solids from the slurry to produce a removed stream containing the solidifiable gas component that was removed from the process gas stream.
A system for removing a solidifiable gas component from a process gas stream, the system comprising:
- means for providing a cold liquid and a process gas stream;
- wherein the process gas stream includes a solidifiable gas component having a freezing point and at least one other gas component having a freezing point that is lower than the freezing point of the solidifiable gas component;
- and further wherein the cold liquid has a freezing point that is lower than a temperature at which the solidifable gas component within the process gas stream will transition to a solid phase, is liquid at a temperature of 20° C. and a pressure of 1 atm, and has a different composition than the process gas stream;
- means for directly contacting the cold liquid with the process gas stream to solidify the solidifiable gas component and to form a liquid-solid slurry and a treated gas stream;
- wherein the slurry contains the cold liquid and the solidified solidifiable gas component;
- and further wherein the treated gas stream contains a portion of the process gas stream that was not solidified to form the slurry;
- and
- means for removing the solidified solidifiable gas component from the slurry.
Dependencies are inferred from the claim text.