Carbon dioxide splitting using an electro-thermochemical hybrid looping strategy
| Autor: | Wesley Luc, Jonathan Rosen, Feng Jiao, Matthew Jouny |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
Electrolysis
Materials science Renewable Energy Sustainability and the Environment Human metabolism chemistry.chemical_element 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology Electrochemistry 01 natural sciences Pollution Oxygen 0104 chemical sciences law.invention chemistry.chemical_compound Nuclear Energy and Engineering Chemical engineering chemistry law Scientific method Carbon dioxide Environmental Chemistry 0210 nano-technology Selectivity Carbon monoxide |
| Zdroj: | Energy & Environmental Science. 11:2928-2934 |
| ISSN: | 1754-5706 1754-5692 |
| Popis: | Reclaiming oxygen (O2) efficiently from carbon dioxide (CO2), a major product of human metabolism, is a key technology to minimize the oxygen supply required for challenging missions such as manned deep space exploration. Ideally, a method that can convert CO2 into elemental carbon (C) and O2 under mild conditions is highly desirable; however, due to the highly unfavorable thermodynamics, direct CO2 splitting requires extreme conditions. Herein, we present an electro-thermochemical hybrid looping (ETHL) strategy to split CO2 into C and O2 under mild conditions with a 100% theoretical oxygen recovery efficiency, which cannot be accomplished using any existing electrochemical or thermochemical process. The ETHL process combines an electrochemical step that reduces CO2 into carbon monoxide (CO) with a thermochemical step that further converts CO into C and CO2. By recycling the produced CO2 from the thermochemical step back to the first electrochemical step, this closes the loop with C and O2 as the only products. The results showed 96% selectivity for the CO2 electrolysis step and nearly 100% selectivity for the CO thermochemical step, demonstrating the feasibility of the ETHL strategy for complete oxygen recovery from CO2. |
| Databáze: | OpenAIRE |
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