Stability of Amine-Functionalized Cellulose during Temperature-Vacuum-Swing Cycling for CO2 Capture from Air
| Autor: | Christoph Gebald, Philippe Tingaut, Jan Andre Wurzbacher, Aldo Steinfeld |
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| Rok vydání: | 2013 |
| Předmět: |
Air Pollutants
Sorbent Chromatography Air capture Nanofibers Temperature Water General Chemistry Carbon Dioxide Oxygen chemistry.chemical_compound Dew point chemistry Chemical engineering Air Pollution Desorption Environmental Chemistry Amine gas treating Relative humidity Adsorption Amines Cellulose Cycling Environmental Restoration and Remediation |
| Zdroj: | Environmental Science & Technology. 47:10063-10070 |
| ISSN: | 1520-5851 0013-936X |
| DOI: | 10.1021/es401731p |
| Popis: | The stability of amine-functionalized nanofibrilated cellulose sorbent for direct air capture of CO2 is investigated during temperature-vacuum-swing (TVS) cycling. The presence of O2 at 90 °C degrades the sorbent, reducing its CO2 adsorption capacity by 30% after 15 h of treatment in moist air with a dew point of 22 °C. In contrast, exposure to moist CO2 at 90 °C with a dew point of 22 °C does not deteriorate its CO2 adsorption capacity after 15 h. Performing 100 TVS consecutive cycles, with CO2 adsorption from ambient air containing 400-530 ppm CO2 at 30 °C and 60% relative humidity and with CO2 desorption at 90 °C and 30 mbar, resulted in a reduction of the equilibrium CO2 adsorption capacity by maximum 5%. The average CO2 adsorption capacity during TVS cyclic operation is 0.90 mmol CO2/g. |
| Databáze: | OpenAIRE |
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