Configurations and method for improved gas removal
First Claim
1. A plant comprising an absorber that operates in a gas phase supercritical region and receiving a dehydrated feed gas comprising at least 5 mol % carbon dioxide, wherein a physical solvent absorbs at least part of the carbon dioxide in the absorber to form a carbon dioxide stream containing at least 95 mol % carbon dioxide.
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Accused Products
Abstract
A plant includes an absorber (103) that operates in a gas phase supercritical region and removes an acid gas from a feed stream (9) at high recovery of the feed stream (10) while producing a high purity acid gas stream (36). Particularly preferred plants include gas purification plants that receive a feed gas with at least 5 mol % carbon dioxide at a pressure of at least 3000 psi.
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Citations
26 Claims
- 1. A plant comprising an absorber that operates in a gas phase supercritical region and receiving a dehydrated feed gas comprising at least 5 mol % carbon dioxide, wherein a physical solvent absorbs at least part of the carbon dioxide in the absorber to form a carbon dioxide stream containing at least 95 mol % carbon dioxide.
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14. A plant comprising:
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an absorber that receives a feed gas at a pressure of at least 1000 psi and comprising at least 5 mol % carbon dioxide, wherein the absorber employs a physical solvent to produce a rich solvent and a product gas that is at least partially depleted from the carbon dioxide;
a first turbine that depressurizes the rich solvent and a first separator that separates a first hydrocarbon portion from the depressurized rich solvent, thereby producing a first hydrocarbon recycle stream and a first rich solvent;
a second turbine that further depressurizes the first rich solvent and a cooler that employs the further depressurized first solvent to cool the physical solvent to maintain a bottom temperature of the absorber in a desired temperature range; and
wherein the further depressurized first solvent is separated in a second separator that separates a second hydrocarbon portion from the further depressurized first solvent, thereby producing a second hydrocarbon recycle stream and a second rich solvent, and wherein the first and second hydrocarbon recycle streams are fed into the absorber. - View Dependent Claims (15, 16, 17, 18, 19, 20, 21, 22)
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23. A method of operating a plant, comprising;
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providing an absorber that receives a feed gas at a pressure of at least 1000 psi wherein the feed gas comprises an acid gas;
removing at least pan of the acid gas from the feed gas using a physical solvent, thereby forming a product gas and a rich solvent;
reducing pressure of the rich solvent to form a hydrocarbon recycle stream that is fed into the absorber, thereby producing a depressurized rich solvent;
using the depressurized rich solvent to cool the physical solvent, thereby maintaining a bottom temperature of the absorber in a desired temperature range and forming a heated depressurized rich solvent; and
separating the heated depressurized rich solvent into a stream containing at least a portion of the acid gas, thereby forming a lean solvent. - View Dependent Claims (24, 25, 26)
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Specification