PROCESS FOR CARBON DIOXIDE RECOVERY FROM A GAS STREAM CONTAINING CARBON DIOXIDE AND HYDROCARBONS
First Claim
1. A process to provide a carbon dioxide-rich gas stream from a carbon dioxide feedstream comprising one or more C1+ hydrocarbon (i.e., one or more of methane, ethane, propane, butane, pentane, or heavier hydrocarbons), whereby the one or more C1+ hydrocarbon is separated from the carbon dioxide feedstream to form a first treated carbon dioxide-rich gas stream by means of a first separation unit comprising:
- (i) a first adsorption unit comprising a first adsorption bed comprising a first adsorbent media which adsorbs one or more C1+ hydrocarbon to form a loaded first adsorbent media and(ii) a first regeneration unit comprising a means to regenerate the loaded first adsorbent media by causing the release of the adsorbed one or more C1+ hydrocarbon from the loaded first adsorbing media and forming regenerated first adsorbent media, wherein the process comprises the steps of;
(a) passing the carbon dioxide feedstream through the first adsorption unit of the first separation unit at a first flow rate generating a loaded first adsorbent media comprising one or more C1+ hydrocarbon and a first treated carbon dioxide-rich gas stream,(b) regenerating the loaded first adsorbent comprising one or more C1+ hydrocarbon by releasing the adsorbed one or more C1+ hydrocarbon from the loaded first adsorbing media and forming regenerated first adsorbent media,(c) recovering, further separating, using as fuel for a combustion process, flaring, or a combination thereof the released one or more C1+ hydrocarbons, and(d) providing the first treated carbon dioxide-rich gas stream to one or more additional separation unit for further treatment, recovering the first treated carbon dioxide-rich treated gas stream, reinjecting the first treated carbon dioxide-rich treated gas stream into an injection well, or a combination thereof.
1 Assignment
0 Petitions
Accused Products
Abstract
The present invention relates to a process for purification of a carbon dioxide feedstock, for example from a production well, which comprises carbon dioxide and gaseous and liquid C1+ hydrocarbons. Specifically, a carbon dioxide feedstream is passed through one or more separation unit wherein each separation unit removes one or more C1+ hydrocarbon from the carbon dioxide feedstream to provide a richer carbon dioxide gas stream. The process comprises one or more separation unit which employs an adsorption media and has an adsorption step and a media regeneration step wherein the regeneration step may be operated as a batch process, a semi-continuous process, or a continuous process. One embodiment of this method provides for the use of a different regenerable adsorbent media in two or more separation units.
-
Citations
8 Claims
-
1. A process to provide a carbon dioxide-rich gas stream from a carbon dioxide feedstream comprising one or more C1+ hydrocarbon (i.e., one or more of methane, ethane, propane, butane, pentane, or heavier hydrocarbons), whereby the one or more C1+ hydrocarbon is separated from the carbon dioxide feedstream to form a first treated carbon dioxide-rich gas stream by means of a first separation unit comprising:
-
(i) a first adsorption unit comprising a first adsorption bed comprising a first adsorbent media which adsorbs one or more C1+ hydrocarbon to form a loaded first adsorbent media and (ii) a first regeneration unit comprising a means to regenerate the loaded first adsorbent media by causing the release of the adsorbed one or more C1+ hydrocarbon from the loaded first adsorbing media and forming regenerated first adsorbent media, wherein the process comprises the steps of; (a) passing the carbon dioxide feedstream through the first adsorption unit of the first separation unit at a first flow rate generating a loaded first adsorbent media comprising one or more C1+ hydrocarbon and a first treated carbon dioxide-rich gas stream, (b) regenerating the loaded first adsorbent comprising one or more C1+ hydrocarbon by releasing the adsorbed one or more C1+ hydrocarbon from the loaded first adsorbing media and forming regenerated first adsorbent media, (c) recovering, further separating, using as fuel for a combustion process, flaring, or a combination thereof the released one or more C1+ hydrocarbons, and (d) providing the first treated carbon dioxide-rich gas stream to one or more additional separation unit for further treatment, recovering the first treated carbon dioxide-rich treated gas stream, reinjecting the first treated carbon dioxide-rich treated gas stream into an injection well, or a combination thereof. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
-
Specification