Abstract
The relative potential of mesoporous silica supported polyethyeleneimine type composites for CO2 direct from air capture (DAC) is investigated via isothermal static fixed volumetric CO2 sorption studies (30, 50 & 75 °C) and the thermogravimetry (20, 40, 50 & 60 °C) of their isothermal processing when fed a 400 ppm CO2 in Ar gas blend. The data derived from the static volumetric dosing technique was found useful for a basic assessment, however it was also found to substantially underestimate the likely capacity of the sorbents achievable during realistic CO2 DAC processing. The thermogravimetry results were found to be directly useful to assess the relative performance of different composites. Branched rather than linear PEI, and larger pore volume support materials, were found to be preferred for the application. The sorption kinetics and capacities of siliceous meso-cellular foam and branched polyethyleneimine composites were found to improve with temperature up to 50 °C. The composite incorporating the greatest amount of the PEI (80 % mesopore volume equivalents) exhibited 1.8 mmol/g CO2 capacity after 55 hours exposure to the gas feed at 50 °C.
Original language | English |
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Title of host publication | SSRN |
Subtitle of host publication | GHGT 2018 - 14th International Conference on Greenhouse Gas Control Technologies |
Number of pages | 6 |
DOIs | |
Publication status | Published - 2018 |
Event | International Conference on Greenhouse Gas Control Technologies 2018 - Melbourne, Australia Duration: 21 Oct 2018 → 25 Oct 2018 Conference number: 14th https://ghgt.info (Website) |
Conference
Conference | International Conference on Greenhouse Gas Control Technologies 2018 |
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Abbreviated title | GHGT 2018 |
Country/Territory | Australia |
City | Melbourne |
Period | 21/10/18 → 25/10/18 |
Internet address |
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Keywords
- adsorption
- air
- CO capture
- PEI
- polyethyleneimine