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US 12,030,013 B2Granted
Process for capturing CO2 from a mobile source using exhaust heat
AssigneeSaudi Arabian Oil Company
InventorsAlexander Voice, Austin Wilks, Esam Zaki Hamad
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Abstract
An exhaust gas carbon dioxide capture and recovery system that may be mounted on a mobile vehicle or vessel. The system may include an exhaust absorber system, a solvent regenerator, a solvent loop, a carbon dioxide compressor, and a carbon dioxide storage tank, among other components. The system may be configured and integrated such that energy in the exhaust may be used to power and drive the carbon dioxide capture while having minimal parasitic effect on the engine.
Claims29
An exhaust gas carbon dioxide capture and recovery system for an internal combustion engine, the system comprising:
- an exhaust absorber system configured to extract at least a portion of carbon dioxide from a first exhaust feed using a lean solvent stream comprising a solvent selective for absorbing carbon dioxide and to produce a first exhaust product having a reduced amount of carbon dioxide and a rich solvent stream comprising solvent and absorbed carbon dioxide;
- a solvent regenerator configured to convert the rich solvent stream into the lean solvent stream and a crude carbon dioxide vapor using at least two heat sources, where the solvent regenerator is coupled to the exhaust absorber system using a system solvent loop such that the solvent regenerator is downstream of the exhaust absorber system for receiving the rich solvent stream and upstream of the exhaust absorber system for providing the lean solvent stream, wherein the solvent regenerator operates at a temperature of above 100° C., and where the at least two heat sources comprise two or more of the following:
- (1) an engine exhaust going to a tailpipe of the internal combustion engine;
- (2) an engine exhaust being recirculated to the internal combustion engine;
- (3) an engine coolant;
- or (4) an engine lubrication oil;
- a carbon dioxide compressor configured to convert the crude carbon dioxide vapor into a concentrated pressurized carbon dioxide product, where the carbon dioxide compressor is coupled downstream of the solvent regenerator along a carbon dioxide gas flow path;
- a carbon dioxide storage tank configured to both receive and store the concentrated pressurized carbon dioxide product, where the carbon dioxide storage tank is coupled downstream of the carbon dioxide compressor along the carbon dioxide gas flow path;
- where the system is mounted on a mobile vehicle or vessel or receives exhaust gas from an internal combustion engine.
6 more elements
A process for reducing carbon dioxide emissions from an internal combustion engine, the process comprising:
- in an exhaust absorber system, extracting at least a portion of carbon dioxide from a first exhaust feed using a lean CO2-selective system solvent and to pass a first exhaust product and a rich system solvent a solvent stream with increased CO2 concentration, wherein the exhaust absorber system operates at a temperature of less than 80° C.;
- in a solvent regenerator, converting the rich system solvent into the lean CO2-selective system solvent and a crude carbon dioxide vapor using at least two heat sources, where the solvent regenerator is coupled to the exhaust absorber system using a system solvent loop such that the solvent regenerator is downstream of the exhaust absorber system on a rich side of the system solvent loop and upstream of the exhaust absorber system on a lean side of the system solvent loop, and wherein the solvent regenerator operates at a temperature of greater than 100° C., and where the at least two heat sources comprise two or more of the following:
- (1) an engine exhaust going to a tailpipe of the internal combustion engine;
- (2) an engine exhaust being recirculated to the internal combustion engine;
- (3) an engine coolant;
- or (4) an engine lubrication oil;
- exchanging heat between the lean solvent leaving the solvent regenerator and the rich solvent leaving the absorber system;
- regenerating the solvent by transferring heat from two or more heat sources into the solvent, thereby raising a temperature and pressure of the solvent, and releasing CO2 from the solvent;
- converting the crude carbon dioxide vapor into a concentrated pressurized carbon dioxide product using a carbon dioxide compressor, wherein the carbon dioxide compressor is coupled downstream of the solvent regenerator along a carbon dioxide gas flow path;
- storing the pressurized carbon dioxide product in a carbon dioxide storage tank.
7 more elements
Dependencies are inferred from the claim text.