Sequential Oxygen Reduction and Adsorption for Carbon Dioxide Purification for Flue Gas Applications
- Department of Chemical and Biomolecular Engineering University of Illinois at Urbana Champaign Urbana IL 61801 USA
- Illinois State Geological Survey University of Illinois at Urbana Champaign Champaign IL 61820 USA
Sequestration or utilization of carbon dioxide (CO 2 ) produced from fossil fuels depends on the ability to transform flue gas into purified streams. Recent developments in oxy‐combustion have improved the efficiency of energy generation and carbon capture (>90% CO 2 ). The subsequent removal of oxygen (O 2 ) from this flue gas is critical, but such a process is energy intensive, technologically challenging, and unsolved. Herein, a simulated flue gas stream is purified by the catalytic conversion of oxygen using methane (CH 4 ). The supported palladium (Pd) catalyst selectively reduces oxygen to an effluent gas with 99.7% CO 2 and 0.3% O 2 . Using a higher Pd loading has no impact on the oxygen conversion, whereas feeding excess CH 4 decreases the selectivity to CO 2 . A complete removal of O 2 is achieved using a copper‐based oxygen scavenger placed after the Pd catalyst bed, yielding a 100.0% pure CO 2 stream.
- Sponsoring Organization:
- USDOE
- Grant/Contract Number:
- DE‐FE0029161
- OSTI ID:
- 1503366
- Journal Information:
- Energy Technology, Journal Name: Energy Technology Vol. 7 Journal Issue: 4; ISSN 2194-4288
- Publisher:
- Wiley Blackwell (John Wiley & Sons)Copyright Statement
- Country of Publication:
- Germany
- Language:
- English
Web of Science
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