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US 2010/0058771 A1Published application
Carbon removal from an integrated thermal recovery process
AssigneeOsum Oil Sands Corp.
InventorsHenry Gil, Andrew Squires
Life of this patent
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Abstract
The present invention is directed to the recovery of hydrocarbons wherein a portion of carbon is removed from the product by a combination of reforming and water-gas shift. The resulting carbon dioxide is removed by known techniques to provide a fuel having reduced levels of carbon.
Claims20
A process, comprising:
- (a) receiving a gas stream comprising primarily methane;
- (b) removing a first portion of the gas stream from a second portion of the gas stream;
- (c) converting the first portion of the gas stream to produce a reformed and water-gas shifted gas comprising primarily carbon dioxide and molecular hydrogen;
- (d) removing, from the reformed and water-gas shifted gas, at least most of the carbon dioxide to form a product gas;
- and
- (e) thereafter combining the product gas with the second portion of the gas stream to form a mixed gas, whereby a carbon content of the mixed gas is reduced relative to the received gas stream.
3 more elements
A system, comprising:
- an input to receive a gas stream comprising primarily methane;
- a gas separator to remove a first portion of the gas stream from a second portion of the gas stream;
- a steam methane reformer reactor to convert the first portion of the gas stream to a reformed gas comprising primarily molecular hydrogen and carbon monoxide;
- a water-gas shift reactor to convert the reformed gas into a reformed and water-gas shifted gas comprising primarily carbon dioxide and molecular hydrogen;
- a carbon separator to remove, from the reformed and water-gas shifted gas, at least most of the carbon dioxide to form a product gas;
- and
- a gas combiner to combine the product gas with the second portion of the gas stream to form a mixed gas, whereby a carbon content of the mixed gas is reduced relative to the received gas stream.
4 more elements
A method, comprising:
- (a) forming, from an input gas stream comprising primarily methane, an intermediate gas stream comprising primarily gas-phase molecular hydrogen and carbon oxide;
- (b) contacting the intermediate gas stream with an alkali and/or alkaline earth metal oxide to form a second intermediate gas stream comprising molecular hydrogen and carbonates;
- (c) removing at least most of the molecular hydrogen from the second intermediate gas stream to form a product gas stream comprising primarily molecular hydrogen and a third intermediate gas stream comprising at least most of the carbonates;
- (d) converting, using heat from the forming step (a), at least most of the carbonates in the third intermediate gas stream to gas-phase carbon oxide and alkali and/or alkaline earth metal oxide;
- (e) removing at least most of the gas-phase carbon oxide from the alkali and/or alkaline earth metal oxide;
- and
- (f) recycling the separated alkali and/or alkaline earth metal oxide to step (b).
4 more elements
Dependencies are inferred from the claim text.